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\n  \n 2023\n \n \n (3)\n \n \n
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\n \n\n \n \n \n \n \n Quantification of Electrode Pulverization Enabled through Operando Video Microscopy of an Electrodeposited Antimony Anode.\n \n \n \n\n\n \n Otten, R. A; Nieto, K.; Schulze, M. C; and Prieto, A. L\n\n\n \n\n\n\n ACS Applied Engineering Materials. 2023.\n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{otten_quantification_2023,\n\ttitle = {Quantification of {Electrode} {Pulverization} {Enabled} through {Operando} {Video} {Microscopy} of an {Electrodeposited} {Antimony} {Anode}},\n\tdoi = {https://doi.org/10.1021/acsaenm.3c00521},\n\tabstract = {Alloying anodes, such as metallic antimony, demonstrate promise as alternative electrode materials for lithium-ion battery systems due to their high theoretical capacity of 660 mA h g–1. However, antimony undergoes anisotropic volume expansion and multiple crystallographic phase transformations upon lithiation and delithiation, which often lead to fracturing or pulverization of the electrode. This pulverization can result in the loss of electrical contact and poor cycling stability. To better understand the degradation mechanism of these electrodes, we demonstrate the use of operando video optical microscopy in tandem with electrochemical testing and a program for the quantification of pulverization for the development of failure mechanism hypotheses. This method is broadly applicable to the characterization and understanding of electrochemically induced mechanical failure mechanisms in high energy density electrodes.},\n\tjournal = {ACS Applied Engineering Materials},\n\tauthor = {Otten, Rhys A and Nieto, Kelly and Schulze, Maxwell C and Prieto, Amy L},\n\tyear = {2023},\n\tfile = {Otten et al_2023_Quantification of Electrode Pulverization Enabled through Operando Video.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Quantification of Electrode Pulverization Enabled through Operando Video_2023\\\\Otten et al_2023_Quantification of Electrode Pulverization Enabled through Operando Video.pdf:application/pdf},\n}\n\n
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\n Alloying anodes, such as metallic antimony, demonstrate promise as alternative electrode materials for lithium-ion battery systems due to their high theoretical capacity of 660 mA h g–1. However, antimony undergoes anisotropic volume expansion and multiple crystallographic phase transformations upon lithiation and delithiation, which often lead to fracturing or pulverization of the electrode. This pulverization can result in the loss of electrical contact and poor cycling stability. To better understand the degradation mechanism of these electrodes, we demonstrate the use of operando video optical microscopy in tandem with electrochemical testing and a program for the quantification of pulverization for the development of failure mechanism hypotheses. This method is broadly applicable to the characterization and understanding of electrochemically induced mechanical failure mechanisms in high energy density electrodes.\n
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\n \n\n \n \n \n \n \n \n Structural Control of Electrodeposited Sb Anodes through Solution Additives and Their Influence on Electrochemical Performance in Na-Ion Batteries.\n \n \n \n \n\n\n \n Nieto, K.; Windsor, D. S.; Kale, A. R.; Gallawa, J. R.; Medina, D. A.; and Prieto, A. L.\n\n\n \n\n\n\n J. Phys. Chem. C, 127(26): 12415–12427. July 2023.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{nieto_structural_2023,\n\ttitle = {Structural {Control} of {Electrodeposited} {Sb} {Anodes} through {Solution} {Additives} and {Their} {Influence} on {Electrochemical} {Performance} in {Na}-{Ion} {Batteries}},\n\tvolume = {127},\n\tissn = {1932-7447},\n\turl = {https://doi.org/10.1021/acs.jpcc.3c01086},\n\tdoi = {10.1021/acs.jpcc.3c01086},\n\tabstract = {Alloy-based materials such as antimony (Sb) are of interest for both Li/Na-ion batteries due to their high theoretical capacity and electronic conductivity. Of the various ways to fabricate Sb films (slurry casting, sputtering, etc.) one promising route is through electrodeposition. Electrodeposition is an industrially relevant synthetic technique that allows for the use of solution additives to control different characteristics such as film uniformity, morphology, and electrical conductivity. Solution additives such as cetyltrimethylammonium bromide (CTAB) and bis(3-sulfopropyl) disulfide (SPS) have been used to control different characteristics such as particle morphology and electrical conductivity in various electrodeposits but have not been applied to the electrodeposition of Sb for battery applications. In this study, Sb films were electrodeposited with varied concentrations of CTAB and SPS and the structure, morphology, composition, and electrochemical performance in Na-ion batteries were compared. We report that CTAB and SPS additives can significantly influence electrodeposited Sb films by altering the morphology and reduce the crystallinity, affecting the electrochemical performance. These studies provide valuable insight into the tunability of alloy-based films through electrodeposition and solution additives for battery applications.},\n\tnumber = {26},\n\turldate = {2023-11-20},\n\tjournal = {J. Phys. Chem. C},\n\tauthor = {Nieto, Kelly and Windsor, Daniel S. and Kale, Amanda R. and Gallawa, Jessica R. and Medina, Dylan A. and Prieto, Amy L.},\n\tmonth = jul,\n\tyear = {2023},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {12415--12427},\n\tfile = {Nieto et al_2023_Structural Control of Electrodeposited Sb Anodes through Solution Additives and.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Structural Control of Electrodeposited Sb Anodes through Solution Additives and_2023\\\\Nieto et al_2023_Structural Control of Electrodeposited Sb Anodes through Solution Additives and2.pdf:application/pdf},\n}\n\n
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\n Alloy-based materials such as antimony (Sb) are of interest for both Li/Na-ion batteries due to their high theoretical capacity and electronic conductivity. Of the various ways to fabricate Sb films (slurry casting, sputtering, etc.) one promising route is through electrodeposition. Electrodeposition is an industrially relevant synthetic technique that allows for the use of solution additives to control different characteristics such as film uniformity, morphology, and electrical conductivity. Solution additives such as cetyltrimethylammonium bromide (CTAB) and bis(3-sulfopropyl) disulfide (SPS) have been used to control different characteristics such as particle morphology and electrical conductivity in various electrodeposits but have not been applied to the electrodeposition of Sb for battery applications. In this study, Sb films were electrodeposited with varied concentrations of CTAB and SPS and the structure, morphology, composition, and electrochemical performance in Na-ion batteries were compared. We report that CTAB and SPS additives can significantly influence electrodeposited Sb films by altering the morphology and reduce the crystallinity, affecting the electrochemical performance. These studies provide valuable insight into the tunability of alloy-based films through electrodeposition and solution additives for battery applications.\n
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\n \n\n \n \n \n \n \n \n Controlling Phase Conversion of Cu-Sb-Se Nanoparticles through the Use of an Amide Base.\n \n \n \n \n\n\n \n Kale, A. R.; Bullett, W. E.; and Prieto, A. L.\n\n\n \n\n\n\n Nano Lett., 23(12): 5460–5466. June 2023.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"ControllingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{kale_controlling_2023,\n\ttitle = {Controlling {Phase} {Conversion} of {Cu}-{Sb}-{Se} {Nanoparticles} through the {Use} of an {Amide} {Base}},\n\tvolume = {23},\n\tissn = {1530-6984},\n\turl = {https://doi.org/10.1021/acs.nanolett.3c00506},\n\tdoi = {10.1021/acs.nanolett.3c00506},\n\tabstract = {The family of copper antimony selenides is important for renewable energy applications. Several phases are accessible within narrow energy and compositional ranges, and tunability between phases is not well-established. Thus, this system provides a rich landscape to understand the phase transformations that occur in hot-injection nanoparticle syntheses. Rietveld refinements on X-ray diffraction patterns model anisotropic morphologies to obtain phase percentages. Reactions targeting the stoichiometry of CuSbSe2 formed Cu3SbSe3 before decomposing to thermodynamically stable CuSbSe2 over time. An amide base was added to balance cation reactivity and directly form CuSbSe2. Interestingly, Cu3SbSe3 remained present but converted to CuSbSe2 more rapidly. We propose that initial Cu3SbSe3 formation may be due to the selenium species not being reactive enough to balance the high reactivity of the copper complex. The unexpected effect of a base on cation reactivity in this system provides insight into the advantages and limitations for its use in other multivalent systems.},\n\tnumber = {12},\n\turldate = {2023-11-20},\n\tjournal = {Nano Lett.},\n\tauthor = {Kale, Amanda R. and Bullett, William E. and Prieto, Amy L.},\n\tmonth = jun,\n\tyear = {2023},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {5460--5466},\n\tfile = {Kale et al_2023_Controlling Phase Conversion of Cu-Sb-Se Nanoparticles through the Use of an.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Controlling Phase Conversion of Cu-Sb-Se Nanoparticles through the Use of an_2023\\\\Kale et al_2023_Controlling Phase Conversion of Cu-Sb-Se Nanoparticles through the Use of an.pdf:application/pdf},\n}\n\n
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\n The family of copper antimony selenides is important for renewable energy applications. Several phases are accessible within narrow energy and compositional ranges, and tunability between phases is not well-established. Thus, this system provides a rich landscape to understand the phase transformations that occur in hot-injection nanoparticle syntheses. Rietveld refinements on X-ray diffraction patterns model anisotropic morphologies to obtain phase percentages. Reactions targeting the stoichiometry of CuSbSe2 formed Cu3SbSe3 before decomposing to thermodynamically stable CuSbSe2 over time. An amide base was added to balance cation reactivity and directly form CuSbSe2. Interestingly, Cu3SbSe3 remained present but converted to CuSbSe2 more rapidly. We propose that initial Cu3SbSe3 formation may be due to the selenium species not being reactive enough to balance the high reactivity of the copper complex. The unexpected effect of a base on cation reactivity in this system provides insight into the advantages and limitations for its use in other multivalent systems.\n
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\n  \n 2022\n \n \n (3)\n \n \n
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\n \n\n \n \n \n \n \n \n Electrodeposition vs Slurry Casting: How Fabrication Affects Electrochemical Reactions of Sb Electrodes in Sodium-Ion Batteries.\n \n \n \n \n\n\n \n Nieto, K.; Gimble, N. J.; Rudolph, L. J.; Kale, A. R.; and Prieto, A. L.\n\n\n \n\n\n\n J. Electrochem. Soc., 169(5): 050537. May 2022.\n Publisher: IOP Publishing\n\n\n\n
\n\n\n\n \n \n \"ElectrodepositionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{nieto_electrodeposition_2022,\n\ttitle = {Electrodeposition vs {Slurry} {Casting}: {How} {Fabrication} {Affects} {Electrochemical} {Reactions} of {Sb} {Electrodes} in {Sodium}-{Ion} {Batteries}},\n\tvolume = {169},\n\tissn = {1945-7111},\n\tshorttitle = {Electrodeposition vs {Slurry} {Casting}},\n\turl = {https://dx.doi.org/10.1149/1945-7111/ac6b5e},\n\tdoi = {10.1149/1945-7111/ac6b5e},\n\tabstract = {Antimony (Sb) electrodes are an ideal anode material for sodium-ion batteries, which are an attractive energy storage system to support grid-level energy storage. These anodes have high thermal stability, good rate performance, and good electronic conductivity, but there are limitations on the fundamental understanding of phases present as the material is sodiated and desodiated. Therefore, detailed investigations of the impact of the structure-property relationships on the performance of Sb electrodes are crucial for understanding how the degradation mechanisms of these electrodes can be controlled. Although significant work has gone into understanding the sodiation/desodiation mechanism of Sb-based anodes, the fabrication method, electrode composition and experimental parameters vary tremendously and there are discrepancies in the reported sodiation/desodiation reactions. Here we report the use of electrodeposition and slurry casting to fabricate Sb composite films to investigate how different fabrication techniques influence observed sodiation/desodiation reactions. We report that electrode fabrication techniques can dramatically impact the sodiation/desodiation reaction mechanism due to mechanical stability, morphology, and composition of the film. Electrodeposition has been shown to be a viable fabrication technique to process anode materials and to study reaction mechanisms at longer lengths scales without the convolution of binders and additives.},\n\tlanguage = {en},\n\tnumber = {5},\n\turldate = {2023-11-20},\n\tjournal = {J. Electrochem. Soc.},\n\tauthor = {Nieto, Kelly and Gimble, Nathan J. and Rudolph, Layton J. and Kale, Amanda R. and Prieto, Amy L.},\n\tmonth = may,\n\tyear = {2022},\n\tnote = {Publisher: IOP Publishing},\n\tpages = {050537},\n\tfile = {Nieto et al_2022_Electrodeposition vs Slurry Casting.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Electrodeposition vs Slurry Casting_2022\\\\Nieto et al_2022_Electrodeposition vs Slurry Casting3.pdf:application/pdf},\n}\n\n
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\n Antimony (Sb) electrodes are an ideal anode material for sodium-ion batteries, which are an attractive energy storage system to support grid-level energy storage. These anodes have high thermal stability, good rate performance, and good electronic conductivity, but there are limitations on the fundamental understanding of phases present as the material is sodiated and desodiated. Therefore, detailed investigations of the impact of the structure-property relationships on the performance of Sb electrodes are crucial for understanding how the degradation mechanisms of these electrodes can be controlled. Although significant work has gone into understanding the sodiation/desodiation mechanism of Sb-based anodes, the fabrication method, electrode composition and experimental parameters vary tremendously and there are discrepancies in the reported sodiation/desodiation reactions. Here we report the use of electrodeposition and slurry casting to fabricate Sb composite films to investigate how different fabrication techniques influence observed sodiation/desodiation reactions. We report that electrode fabrication techniques can dramatically impact the sodiation/desodiation reaction mechanism due to mechanical stability, morphology, and composition of the film. Electrodeposition has been shown to be a viable fabrication technique to process anode materials and to study reaction mechanisms at longer lengths scales without the convolution of binders and additives.\n
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\n \n\n \n \n \n \n \n \n Spontaneous solid electrolyte interface formation in uncycled sodium half-cell batteries: using X-ray photoelectron spectroscopy to explore the pre-passivation of sodium metal by fluoroethylene carbonate before potentials are applied.\n \n \n \n \n\n\n \n J. Gimble, N.; and L. Prieto, A.\n\n\n \n\n\n\n Sustainable Energy & Fuels, 6(20): 4736–4740. 2022.\n Publisher: Royal Society of Chemistry\n\n\n\n
\n\n\n\n \n \n \"SpontaneousPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 2 downloads\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{jgimble_spontaneous_2022,\n\ttitle = {Spontaneous solid electrolyte interface formation in uncycled sodium half-cell batteries: using {X}-ray photoelectron spectroscopy to explore the pre-passivation of sodium metal by fluoroethylene carbonate before potentials are applied},\n\tvolume = {6},\n\tshorttitle = {Spontaneous solid electrolyte interface formation in uncycled sodium half-cell batteries},\n\turl = {https://pubs.rsc.org/en/content/articlelanding/2022/se/d2se00888b},\n\tdoi = {10.1039/D2SE00888B},\n\tabstract = {Testing sodium battery technology relies on a half-cell setup with sodium metal as the counter electrode. Herein, we show that sodium metal reacts with conventional carbonate electrolyte to form the solid electrolyte interface (SEI) on the working electrode spontaneously in a half-cell, without applying any external potential. Fluoroethylene carbonate prevents this spontaneous SEI formation by pre-passivating sodium metal, again before any potentials are applied or current is passed.},\n\tlanguage = {en},\n\tnumber = {20},\n\turldate = {2023-11-20},\n\tjournal = {Sustainable Energy \\& Fuels},\n\tauthor = {J. Gimble, Nathan and L. Prieto, Amy},\n\tyear = {2022},\n\tnote = {Publisher: Royal Society of Chemistry},\n\tpages = {4736--4740},\n\tfile = {J. Gimble_L. Prieto_2022_Spontaneous solid electrolyte interface formation in uncycled sodium half-cell.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Spontaneous solid electrolyte interface formation in uncycled sodium half-cell_2022\\\\J. Gimble_L. Prieto_2022_Spontaneous solid electrolyte interface formation in uncycled sodium half-cell.pdf:application/pdf},\n}\n\n
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\n Testing sodium battery technology relies on a half-cell setup with sodium metal as the counter electrode. Herein, we show that sodium metal reacts with conventional carbonate electrolyte to form the solid electrolyte interface (SEI) on the working electrode spontaneously in a half-cell, without applying any external potential. Fluoroethylene carbonate prevents this spontaneous SEI formation by pre-passivating sodium metal, again before any potentials are applied or current is passed.\n
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\n \n\n \n \n \n \n \n \n Mixed-conducting properties of annealed polyacrylonitrile activated by n-doping of conjugated domains.\n \n \n \n \n\n\n \n C. Schulze, M.; and L. Prieto, A.\n\n\n \n\n\n\n Chemical Science, 13(1): 225–235. 2022.\n Publisher: Royal Society of Chemistry\n\n\n\n
\n\n\n\n \n \n \"Mixed-conductingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{cschulze_mixed-conducting_2022,\n\ttitle = {Mixed-conducting properties of annealed polyacrylonitrile activated by n-doping of conjugated domains},\n\tvolume = {13},\n\turl = {https://pubs.rsc.org/en/content/articlelanding/2022/sc/d1sc02350k},\n\tdoi = {10.1039/D1SC02350K},\n\tabstract = {Critical limiting factors in next generation electrode materials for rechargeable batteries include short lifetimes, poor reaction reversibility, and safety concerns. Many of these challenges are caused by detrimental interactions at the interfaces between electrode materials and the electrolyte. Thermally annealed polyacrylonitrile has recently shown empirical success in mitigating such detrimental interactions when used in conjunction with alloy anode materials, though the mechanisms by which it does so are not well understood. This is a common problem in the battery community: an additive or a coating improves certain battery characteristics, but without a deeper understanding of how or why, design rules to further motivate the design of new chemistries can't be developed. Herein, we systematically investigate the effect of heating parameters on the properties of annealed polyacrylonitrile to identify the structural basis for such beneficial properties. We find that sufficiently long annealing times and control over temperature result in the formation of conjugated imine domains. When sufficiently large, the conjugated domains can be electrochemically reduced in a Li-ion half-cell battery, effectively n-doping the polymeric matrix and allowing it to become a mixed-conductor, with the ability to conduct both the Li-ions and electrons needed for reversible lithiation of an interdispersed alloy active material like antimony. Not only do those relationships inform design principles for annealed polyacrylonitrile containing electrodes, but they also identify new strategies in the development of mixed-conducting materials for use in next generation battery electrodes.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2023-11-20},\n\tjournal = {Chemical Science},\n\tauthor = {C. Schulze, Maxwell and L. Prieto, Amy},\n\tyear = {2022},\n\tnote = {Publisher: Royal Society of Chemistry},\n\tpages = {225--235},\n\tfile = {C. Schulze_L. Prieto_2022_Mixed-conducting properties of annealed polyacrylonitrile activated by n-doping.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Mixed-conducting properties of annealed polyacrylonitrile activated by n-doping_2022\\\\C. Schulze_L. Prieto_2022_Mixed-conducting properties of annealed polyacrylonitrile activated by n-doping.pdf:application/pdf},\n}\n\n
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\n Critical limiting factors in next generation electrode materials for rechargeable batteries include short lifetimes, poor reaction reversibility, and safety concerns. Many of these challenges are caused by detrimental interactions at the interfaces between electrode materials and the electrolyte. Thermally annealed polyacrylonitrile has recently shown empirical success in mitigating such detrimental interactions when used in conjunction with alloy anode materials, though the mechanisms by which it does so are not well understood. This is a common problem in the battery community: an additive or a coating improves certain battery characteristics, but without a deeper understanding of how or why, design rules to further motivate the design of new chemistries can't be developed. Herein, we systematically investigate the effect of heating parameters on the properties of annealed polyacrylonitrile to identify the structural basis for such beneficial properties. We find that sufficiently long annealing times and control over temperature result in the formation of conjugated imine domains. When sufficiently large, the conjugated domains can be electrochemically reduced in a Li-ion half-cell battery, effectively n-doping the polymeric matrix and allowing it to become a mixed-conductor, with the ability to conduct both the Li-ions and electrons needed for reversible lithiation of an interdispersed alloy active material like antimony. Not only do those relationships inform design principles for annealed polyacrylonitrile containing electrodes, but they also identify new strategies in the development of mixed-conducting materials for use in next generation battery electrodes.\n
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\n \n\n \n \n \n \n \n \n Olivine Crystal Structure-Directed Twinning in Iron Germanium Sulfide (Fe2GeS4) Nanoparticles.\n \n \n \n \n\n\n \n Miller, R. C.; Geiss, R. H.; and Prieto, A. L.\n\n\n \n\n\n\n ACS Nano, 15(7): 11981–11991. July 2021.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"OlivinePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{miller_olivine_2021,\n\ttitle = {Olivine {Crystal} {Structure}-{Directed} {Twinning} in {Iron} {Germanium} {Sulfide} ({Fe2GeS4}) {Nanoparticles}},\n\tvolume = {15},\n\tissn = {1936-0851},\n\turl = {https://doi.org/10.1021/acsnano.1c03237},\n\tdoi = {10.1021/acsnano.1c03237},\n\tabstract = {Understanding the microstructure of complex crystal structures is critical for controlling material properties in next-generation devices. Synthetic reports of twinning in bulk and nanostructured crystals with detailed crystallographic characterization are integral for advancing systematic studies of twinning phenomena. Herein, we report a synthetic route to controllably twinned olivine nanoparticles. Microstructural characterization of Fe2GeS4 nanoparticles via electron microscopy (imaging, diffraction, and crystallographic analysis) demonstrates the formation of triplets of twins, or trillings. We establish synthetic control over the particle crystallinity and crystal growth. We describe the geometrical basis for twin formation, hexagonal pseudosymmetry of the orthorhombic lattice, and rank all of the reported olivine compounds according to this favorability to form twins. The work in this study highlights an area ripe for future exploration with respect to the advancement of solution-phase synthetic approaches that can control microstructure in compositionally complex, technologically relevant structures. Finally, we discuss the potential implications for olivine properties and performance in various applications.},\n\tnumber = {7},\n\turldate = {2023-11-20},\n\tjournal = {ACS Nano},\n\tauthor = {Miller, Rebecca C. and Geiss, Roy H. and Prieto, Amy L.},\n\tmonth = jul,\n\tyear = {2021},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {11981--11991},\n\tfile = {Miller et al_2021_Olivine Crystal Structure-Directed Twinning in Iron Germanium Sulfide (Fe2GeS4).pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Olivine Crystal Structure-Directed Twinning in Iron Germanium Sulfide (Fe2GeS4)_2021\\\\Miller et al_2021_Olivine Crystal Structure-Directed Twinning in Iron Germanium Sulfide (Fe2GeS4)2.pdf:application/pdf},\n}\n\n
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\n Understanding the microstructure of complex crystal structures is critical for controlling material properties in next-generation devices. Synthetic reports of twinning in bulk and nanostructured crystals with detailed crystallographic characterization are integral for advancing systematic studies of twinning phenomena. Herein, we report a synthetic route to controllably twinned olivine nanoparticles. Microstructural characterization of Fe2GeS4 nanoparticles via electron microscopy (imaging, diffraction, and crystallographic analysis) demonstrates the formation of triplets of twins, or trillings. We establish synthetic control over the particle crystallinity and crystal growth. We describe the geometrical basis for twin formation, hexagonal pseudosymmetry of the orthorhombic lattice, and rank all of the reported olivine compounds according to this favorability to form twins. The work in this study highlights an area ripe for future exploration with respect to the advancement of solution-phase synthetic approaches that can control microstructure in compositionally complex, technologically relevant structures. Finally, we discuss the potential implications for olivine properties and performance in various applications.\n
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\n \n\n \n \n \n \n \n \n Bulk Synthesis, Structure, and Electronic Properties of Magnesium Zirconium Nitride Solid Solutions.\n \n \n \n \n\n\n \n Rom, C. L.; Fallon, M. J.; Wustrow, A.; Prieto, A. L.; and Neilson, J. R.\n\n\n \n\n\n\n Chem. Mater., 33(13): 5345–5354. July 2021.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"BulkPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{rom_bulk_2021,\n\ttitle = {Bulk {Synthesis}, {Structure}, and {Electronic} {Properties} of {Magnesium} {Zirconium} {Nitride} {Solid} {Solutions}},\n\tvolume = {33},\n\tissn = {0897-4756},\n\turl = {https://doi.org/10.1021/acs.chemmater.1c01450},\n\tdoi = {10.1021/acs.chemmater.1c01450},\n\tabstract = {Ternary nitride phase space holds great potential for new functional materials, as suggested by computational predictions of yet-to-be discovered stable phases. Here, we report a metathesis route to bulk powders of MgZrN2 and the solid solutions MgxZr2–xN2 (0 {\\textless} x {\\textless} 1). These ternary phases only result when lower temperature reactions are used, in contrast to previous work using the similar Mg-based metathesis reactions that resulted in the formation of exclusively ZrN. Thermochemical calculations illustrate why lower temperature metathesis reactions yield the incorporation of Mg, while higher temperature ceramic reactions yield exclusively ZrN. Experimental in situ X-ray diffraction of metathesis reactions during heating reveals two stages in the reaction pathway: initial consumption of the precursors to make an amorphous product (Trxn {\\textgreater} 350 °C) followed by crystallization at higher temperatures (Trxn {\\textgreater} 500 °C). Changing the ratio of the metathesis precursors (Mg2NCl and ZrCl4) controllably varies the composition of MgxZr2–xN2, which crystallizes as a cation-disordered rock salt, as evidenced by high-resolution synchrotron X-ray diffraction, electron microscopy, and bulk compositional analysis. Variation in composition leads to a gradual metal-to-insulator transition with increasing x, similar to other reports of analogous thin film specimens produced by combinatorial sputtering. Meanwhile, the optical behavior of these powders suggests nanoscale compositional inhomogeneity, as signatures of ZrN-like absorption are detectable even in Mg-rich samples. This metathesis approach appears to be generalizable to the synthesis of bulk ternary nitride materials.},\n\tnumber = {13},\n\turldate = {2023-11-20},\n\tjournal = {Chem. Mater.},\n\tauthor = {Rom, Christopher L. and Fallon, M. Jewels and Wustrow, Allison and Prieto, Amy L. and Neilson, James R.},\n\tmonth = jul,\n\tyear = {2021},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {5345--5354},\n\tfile = {Rom et al_2021_Bulk Synthesis, Structure, and Electronic Properties of Magnesium Zirconium.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Bulk Synthesis, Structure, and Electronic Properties of Magnesium Zirconium_2021\\\\Rom et al_2021_Bulk Synthesis, Structure, and Electronic Properties of Magnesium Zirconium2.pdf:application/pdf},\n}\n\n
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\n Ternary nitride phase space holds great potential for new functional materials, as suggested by computational predictions of yet-to-be discovered stable phases. Here, we report a metathesis route to bulk powders of MgZrN2 and the solid solutions MgxZr2–xN2 (0 \\textless x \\textless 1). These ternary phases only result when lower temperature reactions are used, in contrast to previous work using the similar Mg-based metathesis reactions that resulted in the formation of exclusively ZrN. Thermochemical calculations illustrate why lower temperature metathesis reactions yield the incorporation of Mg, while higher temperature ceramic reactions yield exclusively ZrN. Experimental in situ X-ray diffraction of metathesis reactions during heating reveals two stages in the reaction pathway: initial consumption of the precursors to make an amorphous product (Trxn \\textgreater 350 °C) followed by crystallization at higher temperatures (Trxn \\textgreater 500 °C). Changing the ratio of the metathesis precursors (Mg2NCl and ZrCl4) controllably varies the composition of MgxZr2–xN2, which crystallizes as a cation-disordered rock salt, as evidenced by high-resolution synchrotron X-ray diffraction, electron microscopy, and bulk compositional analysis. Variation in composition leads to a gradual metal-to-insulator transition with increasing x, similar to other reports of analogous thin film specimens produced by combinatorial sputtering. Meanwhile, the optical behavior of these powders suggests nanoscale compositional inhomogeneity, as signatures of ZrN-like absorption are detectable even in Mg-rich samples. This metathesis approach appears to be generalizable to the synthesis of bulk ternary nitride materials.\n
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\n \n\n \n \n \n \n \n \n X-ray photoelectron spectroscopy as a probe for understanding the potential-dependent impact of fluoroethylene carbonate on the solid electrolyte interface formation in Na/Cu2Sb batteries.\n \n \n \n \n\n\n \n Gimble, N. J.; Kraynak, L. A.; Schneider, J. D.; Schulze, M. C.; and Prieto, A. L.\n\n\n \n\n\n\n Journal of Power Sources, 489: 229171. March 2021.\n \n\n\n\n
\n\n\n\n \n \n \"X-rayPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{gimble_x-ray_2021,\n\ttitle = {X-ray photoelectron spectroscopy as a probe for understanding the potential-dependent impact of fluoroethylene carbonate on the solid electrolyte interface formation in {Na}/{Cu2Sb} batteries},\n\tvolume = {489},\n\tissn = {0378-7753},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0378775320314622},\n\tdoi = {10.1016/j.jpowsour.2020.229171},\n\tabstract = {The solid electrolyte interface (SEI) forms from electrolyte decomposition during the initial discharge of half-cell batteries and is affected by the presence of electrolyte additives. Breaking down the initial discharge into stages, defined by voltage cut offs, can help discover the role of additives in SEI growth. In this study, X-Ray Photoelectron Spectroscopy (XPS) is used to analyze the SEI formed on electrodeposited, binder free Cu2Sb thin films in sodium ion half-cell batteries. The presence of fluoro-ethylene carbonate (FEC), an electrolyte additive known to enhance battery lifetime, has a significant effect on the carbon 1s XPS spectra. The concentration of oxygenated carbon environments are dramatically decreased when FEC is added to the system. These environments were present in samples without FEC before significant electrochemistry was observed, potentially displaying the reactivity of sodium metal with conventional carbonate electrolytes to form the initial components of the SEI before the battery is cycled. The differences observed when FEC is added are likely the chemical environments of the SEI that have the dramatic effect on battery performance. Interestingly, these results suggest that the critical aspects of SEI formation are determined before the active material is sodiated, with FEC playing an integral role.},\n\turldate = {2023-11-20},\n\tjournal = {Journal of Power Sources},\n\tauthor = {Gimble, Nathan J. and Kraynak, Leslie A. and Schneider, Jacob D. and Schulze, Maxwell C. and Prieto, Amy L.},\n\tmonth = mar,\n\tyear = {2021},\n\tkeywords = {Additives, Batteries, Electrolyte, Sodium, XPS},\n\tpages = {229171},\n\tfile = {Gimble et al_2021_X-ray photoelectron spectroscopy as a probe for understanding the.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\X-ray photoelectron spectroscopy as a probe for understanding the_2021\\\\Gimble et al_2021_X-ray photoelectron spectroscopy as a probe for understanding the2.pdf:application/pdf},\n}\n\n
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\n The solid electrolyte interface (SEI) forms from electrolyte decomposition during the initial discharge of half-cell batteries and is affected by the presence of electrolyte additives. Breaking down the initial discharge into stages, defined by voltage cut offs, can help discover the role of additives in SEI growth. In this study, X-Ray Photoelectron Spectroscopy (XPS) is used to analyze the SEI formed on electrodeposited, binder free Cu2Sb thin films in sodium ion half-cell batteries. The presence of fluoro-ethylene carbonate (FEC), an electrolyte additive known to enhance battery lifetime, has a significant effect on the carbon 1s XPS spectra. The concentration of oxygenated carbon environments are dramatically decreased when FEC is added to the system. These environments were present in samples without FEC before significant electrochemistry was observed, potentially displaying the reactivity of sodium metal with conventional carbonate electrolytes to form the initial components of the SEI before the battery is cycled. The differences observed when FEC is added are likely the chemical environments of the SEI that have the dramatic effect on battery performance. Interestingly, these results suggest that the critical aspects of SEI formation are determined before the active material is sodiated, with FEC playing an integral role.\n
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\n \n\n \n \n \n \n \n \n Electrodeposition as a Powerful Tool for the Fabrication and Characterization of Next-Generation Anodes for Sodium Ion Rechargeable Batteries.\n \n \n \n \n\n\n \n Gimble, N. J.; Nieto, K.; and Prieto, A. L.\n\n\n \n\n\n\n Electrochem. Soc. Interface, 30(1): 59. March 2021.\n Publisher: IOP Publishing\n\n\n\n
\n\n\n\n \n \n \"ElectrodepositionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{gimble_electrodeposition_2021,\n\ttitle = {Electrodeposition as a {Powerful} {Tool} for the {Fabrication} and {Characterization} of {Next}-{Generation} {Anodes} for {Sodium} {Ion} {Rechargeable} {Batteries}},\n\tvolume = {30},\n\tissn = {1944-8783},\n\turl = {https://iopscience.iop.org/article/10.1149/2.F09211IF/meta},\n\tdoi = {10.1149/2.F09211IF},\n\tabstract = {As the number of markets, as well as the overall market size, for rechargeable batteries continues to grow, it is clear that there is no one perfect battery to suit every application. In the best case, we would have batteries that store a very large amount of energy per unit mass or volume (energy density), can charge and discharge very quickly (power density), can cycle many times with very low loss of efficiency (cycle life), and are safe. Ideally, such a battery would be made from Earth-abundant, recyclable, sustainably mined or made materials, and could be scaled using inexpensive, safe manufacturing. There is, as of now, no such battery. Because we do not have a battery that is one size fits all, the wide range of potential applications for energy storage is a significant driving force for discovering and implementing a diversity of new battery chemistries to meet a wide range of requirements. In this Interface article, we describe the use of electrodeposition as a synthesis method for battery materials to enable and accelerate the design, understanding, and optimization of electrodes for sodium ion and sodium metal rechargeable batteries for applications where cost is more important than the overall weight of the battery.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2023-11-20},\n\tjournal = {Electrochem. Soc. Interface},\n\tauthor = {Gimble, Nathan J. and Nieto, Kelly and Prieto, Amy L.},\n\tmonth = mar,\n\tyear = {2021},\n\tnote = {Publisher: IOP Publishing},\n\tpages = {59},\n\tfile = {Gimble et al_2021_Electrodeposition as a Powerful Tool for the Fabrication and Characterization.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Electrodeposition as a Powerful Tool for the Fabrication and Characterization_2021\\\\Gimble et al_2021_Electrodeposition as a Powerful Tool for the Fabrication and Characterization2.pdf:application/pdf},\n}\n\n
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\n As the number of markets, as well as the overall market size, for rechargeable batteries continues to grow, it is clear that there is no one perfect battery to suit every application. In the best case, we would have batteries that store a very large amount of energy per unit mass or volume (energy density), can charge and discharge very quickly (power density), can cycle many times with very low loss of efficiency (cycle life), and are safe. Ideally, such a battery would be made from Earth-abundant, recyclable, sustainably mined or made materials, and could be scaled using inexpensive, safe manufacturing. There is, as of now, no such battery. Because we do not have a battery that is one size fits all, the wide range of potential applications for energy storage is a significant driving force for discovering and implementing a diversity of new battery chemistries to meet a wide range of requirements. In this Interface article, we describe the use of electrodeposition as a synthesis method for battery materials to enable and accelerate the design, understanding, and optimization of electrodes for sodium ion and sodium metal rechargeable batteries for applications where cost is more important than the overall weight of the battery.\n
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\n \n\n \n \n \n \n \n \n Exploring the Role of Vinylene Carbonate in the Passivation and Capacity Retention of Cu2Sb Thin Film Anodes.\n \n \n \n \n\n\n \n Kraynak, L. A.; Schneider, J. D.; and Prieto, A. L.\n\n\n \n\n\n\n J. Phys. Chem. C, 124(48): 26083–26093. December 2020.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"ExploringPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{kraynak_exploring_2020,\n\ttitle = {Exploring the {Role} of {Vinylene} {Carbonate} in the {Passivation} and {Capacity} {Retention} of {Cu2Sb} {Thin} {Film} {Anodes}},\n\tvolume = {124},\n\tissn = {1932-7447},\n\turl = {https://doi.org/10.1021/acs.jpcc.0c04064},\n\tdoi = {10.1021/acs.jpcc.0c04064},\n\tabstract = {Electrolyte additives such as vinylene carbonate (VC) have been demonstrated to improve the capacity retention for many types of Li-ion battery electrodes, including intermetallic alloying anodes, but it is still unclear why VC extends the cycle lifetime of copper antimonide (Cu2Sb) anodes so dramatically. Here, we have studied how VC affects the solid electrolyte interface formed on Cu2Sb thin film anodes in fluorine-free electrolyte solutions in order to better understand which nonfluorinated species may play an important role in effective Cu2Sb passivation. Using differential capacity analysis and X-ray photoelectron spectroscopy, we have found that VC effectively passivates Cu2Sb and prevents Cu/Cu2Sb oxidation at high potentials. Carbonate species from the reduction of VC seem to play an important role in passivation, while inorganic species like LiClO4 from the F-free supporting electrolyte do not seem to be beneficial.},\n\tnumber = {48},\n\turldate = {2023-11-20},\n\tjournal = {J. Phys. Chem. C},\n\tauthor = {Kraynak, Leslie A. and Schneider, Jacob D. and Prieto, Amy L.},\n\tmonth = dec,\n\tyear = {2020},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {26083--26093},\n\tfile = {Kraynak et al_2020_Exploring the Role of Vinylene Carbonate in the Passivation and Capacity.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Exploring the Role of Vinylene Carbonate in the Passivation and Capacity_2020\\\\Kraynak et al_2020_Exploring the Role of Vinylene Carbonate in the Passivation and Capacity2.pdf:application/pdf},\n}\n\n
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\n Electrolyte additives such as vinylene carbonate (VC) have been demonstrated to improve the capacity retention for many types of Li-ion battery electrodes, including intermetallic alloying anodes, but it is still unclear why VC extends the cycle lifetime of copper antimonide (Cu2Sb) anodes so dramatically. Here, we have studied how VC affects the solid electrolyte interface formed on Cu2Sb thin film anodes in fluorine-free electrolyte solutions in order to better understand which nonfluorinated species may play an important role in effective Cu2Sb passivation. Using differential capacity analysis and X-ray photoelectron spectroscopy, we have found that VC effectively passivates Cu2Sb and prevents Cu/Cu2Sb oxidation at high potentials. Carbonate species from the reduction of VC seem to play an important role in passivation, while inorganic species like LiClO4 from the F-free supporting electrolyte do not seem to be beneficial.\n
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\n \n\n \n \n \n \n \n \n Design of a Sample Transfer Holder to Enable Air-Free X-ray Photoelectron Spectroscopy.\n \n \n \n \n\n\n \n Schneider, J. D.; Agocs, D. B.; and Prieto, A. L.\n\n\n \n\n\n\n Chem. Mater., 32(19): 8091–8096. October 2020.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{schneider_design_2020,\n\ttitle = {Design of a {Sample} {Transfer} {Holder} to {Enable} {Air}-{Free} {X}-ray {Photoelectron} {Spectroscopy}},\n\tvolume = {32},\n\tissn = {0897-4756},\n\turl = {https://doi.org/10.1021/acs.chemmater.0c01895},\n\tdoi = {10.1021/acs.chemmater.0c01895},\n\tabstract = {Surface analysis of air-sensitive samples is difficult without controlled-environment sample transfer tubes or expensive vacuum transfer suitcases. Through the use of vacuum sealing and commercial magnets, we demonstrate a concept for a sample holder that can be used to transfer samples from an inert environment directly into an X-ray photoelectron spectrometer. Our results show the efficacy of the holder through analysis of an air-sensitive CuCl powder, where oxidation was not observed when using the sample holder. This method offers a simple, low-cost alternative to enable routine air-free measurements in instrumentation with vacuum-controlled sample introduction chambers. Our aim with this report is to share the design so that this sample holder can be made anywhere where there is access to a basic machine shop.},\n\tnumber = {19},\n\turldate = {2023-11-20},\n\tjournal = {Chem. Mater.},\n\tauthor = {Schneider, Jacob D. and Agocs, Daniel B. and Prieto, Amy L.},\n\tmonth = oct,\n\tyear = {2020},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {8091--8096},\n\tfile = {Schneider et al_2020_Design of a Sample Transfer Holder to Enable Air-Free X-ray Photoelectron.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Design of a Sample Transfer Holder to Enable Air-Free X-ray Photoelectron_2020\\\\Schneider et al_2020_Design of a Sample Transfer Holder to Enable Air-Free X-ray Photoelectron2.pdf:application/pdf},\n}\n\n
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\n Surface analysis of air-sensitive samples is difficult without controlled-environment sample transfer tubes or expensive vacuum transfer suitcases. Through the use of vacuum sealing and commercial magnets, we demonstrate a concept for a sample holder that can be used to transfer samples from an inert environment directly into an X-ray photoelectron spectrometer. Our results show the efficacy of the holder through analysis of an air-sensitive CuCl powder, where oxidation was not observed when using the sample holder. This method offers a simple, low-cost alternative to enable routine air-free measurements in instrumentation with vacuum-controlled sample introduction chambers. Our aim with this report is to share the design so that this sample holder can be made anywhere where there is access to a basic machine shop.\n
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\n \n\n \n \n \n \n \n \n Amide-Assisted Synthesis of Iron Germanium Sulfide (Fe2GeS4) Nanostars: The Effect of LiN(SiMe3)2 on Precursor Reactivity for Favoring Nanoparticle Nucleation or Growth.\n \n \n \n \n\n\n \n Miller, R. C.; Neilson, J. R.; and Prieto, A. L.\n\n\n \n\n\n\n J. Am. Chem. Soc., 142(15): 7023–7035. April 2020.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"Amide-AssistedPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{miller_amide-assisted_2020,\n\ttitle = {Amide-{Assisted} {Synthesis} of {Iron} {Germanium} {Sulfide} ({Fe2GeS4}) {Nanostars}: {The} {Effect} of {LiN}({SiMe3})2 on {Precursor} {Reactivity} for {Favoring} {Nanoparticle} {Nucleation} or {Growth}},\n\tvolume = {142},\n\tissn = {0002-7863},\n\tshorttitle = {Amide-{Assisted} {Synthesis} of {Iron} {Germanium} {Sulfide} ({Fe2GeS4}) {Nanostars}},\n\turl = {https://doi.org/10.1021/jacs.0c00260},\n\tdoi = {10.1021/jacs.0c00260},\n\tabstract = {Olivine Fe2GeS4 has been identified as a promising photovoltaic absorber material introduced as an alternate candidate to iron pyrite, FeS2. The compounds share similar benefits in terms of elemental abundance and relative nontoxicity, but Fe2GeS4 was predicted to have higher stability with respect to decomposition to alternate phases and, therefore, more optimal device performance. Our initial report of the nanoparticle (NP) synthesis for Fe2GeS4 was not well understood and required an inefficient 24 h growth to dissolve an iron sulfide impurity. Here, we report an amide-assisted Fe2GeS4 NP synthesis that directly forms the phase-pure product in minutes. This significant advance was achieved by the replacement of the poorly understood hexamethyldisilazane (HMDS) additive and TMS2S by the conjugate base, lithium bis(trimethylsilyl)amide (LiN(SiMe3)2), and elemental S, respectively. We hypothesized that fragments of both TMS2S and HMDS had carried out the roles that Brønsted bases play in amide-assisted NP syntheses and were necessary for Ge incorporation. Convolution of this role with the supply of S in TMS2S caused the iron sulfide impurities. Separating these effects in the use of LiN(SiMe3)2 and elemental S resulted in synthetic control over the ternary phase. Herein we explore the Fe–Ge–S reaction landscape and the role of the base. Its concentration was found to increase the reactivities of the Fe, Ge, and S precursors, and we discuss possible metal-amide intermediates. This affords tunability in two areas: favorability of NP nucleation versus growth and phase formation. The phase-purity of Fe2GeS4 depends on the molar ratios of the cations, base, and amine as well as the Fe:Ge:S molar ratios. The resultant Fe2GeS4 NPs exhibit an interesting star anise-like morphology with stacks of nanoplates that intersect along a 6-fold rotation axis. The optical properties of the Fe2GeS4 NPs are consistent with previously published measurements showing a measured band gap of 1.48 eV.},\n\tnumber = {15},\n\turldate = {2023-11-20},\n\tjournal = {J. Am. Chem. Soc.},\n\tauthor = {Miller, Rebecca C. and Neilson, James R. and Prieto, Amy L.},\n\tmonth = apr,\n\tyear = {2020},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {7023--7035},\n\tfile = {Miller et al_2020_Amide-Assisted Synthesis of Iron Germanium Sulfide (Fe2GeS4) Nanostars.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Amide-Assisted Synthesis of Iron Germanium Sulfide (Fe2GeS4) Nanostars_2020\\\\Miller et al_2020_Amide-Assisted Synthesis of Iron Germanium Sulfide (Fe2GeS4) Nanostars2.pdf:application/pdf},\n}\n\n
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\n Olivine Fe2GeS4 has been identified as a promising photovoltaic absorber material introduced as an alternate candidate to iron pyrite, FeS2. The compounds share similar benefits in terms of elemental abundance and relative nontoxicity, but Fe2GeS4 was predicted to have higher stability with respect to decomposition to alternate phases and, therefore, more optimal device performance. Our initial report of the nanoparticle (NP) synthesis for Fe2GeS4 was not well understood and required an inefficient 24 h growth to dissolve an iron sulfide impurity. Here, we report an amide-assisted Fe2GeS4 NP synthesis that directly forms the phase-pure product in minutes. This significant advance was achieved by the replacement of the poorly understood hexamethyldisilazane (HMDS) additive and TMS2S by the conjugate base, lithium bis(trimethylsilyl)amide (LiN(SiMe3)2), and elemental S, respectively. We hypothesized that fragments of both TMS2S and HMDS had carried out the roles that Brønsted bases play in amide-assisted NP syntheses and were necessary for Ge incorporation. Convolution of this role with the supply of S in TMS2S caused the iron sulfide impurities. Separating these effects in the use of LiN(SiMe3)2 and elemental S resulted in synthetic control over the ternary phase. Herein we explore the Fe–Ge–S reaction landscape and the role of the base. Its concentration was found to increase the reactivities of the Fe, Ge, and S precursors, and we discuss possible metal-amide intermediates. This affords tunability in two areas: favorability of NP nucleation versus growth and phase formation. The phase-purity of Fe2GeS4 depends on the molar ratios of the cations, base, and amine as well as the Fe:Ge:S molar ratios. The resultant Fe2GeS4 NPs exhibit an interesting star anise-like morphology with stacks of nanoplates that intersect along a 6-fold rotation axis. The optical properties of the Fe2GeS4 NPs are consistent with previously published measurements showing a measured band gap of 1.48 eV.\n
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\n \n\n \n \n \n \n \n \n Electrodeposition of Sb/CNT composite films as anodes for Li- and Na-ion batteries.\n \n \n \n \n\n\n \n Schulze, M. C.; Belson, R. M.; Kraynak, L. A.; and Prieto, A. L.\n\n\n \n\n\n\n Energy Storage Materials, 25: 572–584. March 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ElectrodepositionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{schulze_electrodeposition_2020,\n\ttitle = {Electrodeposition of {Sb}/{CNT} composite films as anodes for {Li}- and {Na}-ion batteries},\n\tvolume = {25},\n\tissn = {2405-8297},\n\turl = {https://www.sciencedirect.com/science/article/pii/S2405829719309791},\n\tdoi = {10.1016/j.ensm.2019.09.025},\n\tabstract = {Antimony is a known high capacity anode material for both Li- and Na-ion batteries that has the potential to improve the energy storage density over commercial graphite anode-based Li-ion batteries. As with other high capacity anode materials (such as silicon), the large storage capacity of antimony results in large volume changes of the anode during discharge/recharge cycles. This results in the formation of significant cracking of the anode, causing active material to lose electrical connection to the current collector which, ultimately, causes the cell to fail. To address this type of failure, we incorporate carbon nanotubes into antimony carbon nanotube composite electrodes (Sb/CNT) using a one-step electrodeposition procedure. The advantage of directly depositing functional anodes from solution is that no binders are used and there is no post-processing required. This means that the electrical and mechanical behavior of these materials can be probed directly in functioning battery cells, without the convolution of other materials. The Sb/CNT composite films cycle with higher reversible capacities and for longer than Sb films electrodeposited without CNT’s in both the Li-ion and Na-ion cells. Post-cycling characterization of the anodes confirms the ability of the CNT’s to keep the anode film more mechanically and electrically connected, despite large volume changes and significant solid-electrolyte-interface layer formation.},\n\turldate = {2023-11-20},\n\tjournal = {Energy Storage Materials},\n\tauthor = {Schulze, Maxwell C. and Belson, Ryan M. and Kraynak, Leslie A. and Prieto, Amy L.},\n\tmonth = mar,\n\tyear = {2020},\n\tkeywords = {Antimony anode, CNT composite, Electrodeposition, Li-ion battery, Na-ion battery},\n\tpages = {572--584},\n\tfile = {Schulze et al_2020_Electrodeposition of Sb-CNT composite films as anodes for Li- and Na-ion.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Electrodeposition of Sb-CNT composite films as anodes for Li- and Na-ion_2020\\\\Schulze et al_2020_Electrodeposition of Sb-CNT composite films as anodes for Li- and Na-ion3.pdf:application/pdf},\n}\n\n
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\n Antimony is a known high capacity anode material for both Li- and Na-ion batteries that has the potential to improve the energy storage density over commercial graphite anode-based Li-ion batteries. As with other high capacity anode materials (such as silicon), the large storage capacity of antimony results in large volume changes of the anode during discharge/recharge cycles. This results in the formation of significant cracking of the anode, causing active material to lose electrical connection to the current collector which, ultimately, causes the cell to fail. To address this type of failure, we incorporate carbon nanotubes into antimony carbon nanotube composite electrodes (Sb/CNT) using a one-step electrodeposition procedure. The advantage of directly depositing functional anodes from solution is that no binders are used and there is no post-processing required. This means that the electrical and mechanical behavior of these materials can be probed directly in functioning battery cells, without the convolution of other materials. The Sb/CNT composite films cycle with higher reversible capacities and for longer than Sb films electrodeposited without CNT’s in both the Li-ion and Na-ion cells. Post-cycling characterization of the anodes confirms the ability of the CNT’s to keep the anode film more mechanically and electrically connected, despite large volume changes and significant solid-electrolyte-interface layer formation.\n
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\n \n\n \n \n \n \n \n \n A Directed Route to Colloidal Nanoparticle Synthesis of the Copper Selenophosphate Cu3PSe4.\n \n \n \n \n\n\n \n Lee, J. M.; Kraynak, L. A.; and Prieto, A. L.\n\n\n \n\n\n\n Angewandte Chemie International Edition, 59(8): 3038–3042. 2020.\n _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201911385\n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{lee_directed_2020,\n\ttitle = {A {Directed} {Route} to {Colloidal} {Nanoparticle} {Synthesis} of the {Copper} {Selenophosphate} {Cu3PSe4}},\n\tvolume = {59},\n\tcopyright = {© 2019 Wiley-VCH Verlag GmbH \\& Co. KGaA, Weinheim},\n\tissn = {1521-3773},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201911385},\n\tdoi = {10.1002/anie.201911385},\n\tabstract = {The first colloidal nanoparticle synthesis of the copper selenophosphate Cu3PSe4, a promising new material for photovoltaics, is reported. Because the formation of binary copper selenide impurities seemed to form more readily, two approaches were developed to install phosphorus bonds directly: 1) the synthesis of molecular P4Se3 and subsequent reaction with a copper precursor, (P-Se)+Cu, and 2) the synthesis of copper phosphide, Cu3P, nanoparticles and subsequent reaction with a selenium precursor, (Cu-P)+Se. The isolation and purification of Cu3P nanoparticles and subsequent selenization yielded phase-pure Cu3PSe4. Solvent effects and Se precursor reactivities were elucidated and were key to understanding the final reaction conditions.},\n\tlanguage = {en},\n\tnumber = {8},\n\turldate = {2023-11-20},\n\tjournal = {Angewandte Chemie International Edition},\n\tauthor = {Lee, Jennifer M. and Kraynak, Leslie A. and Prieto, Amy L.},\n\tyear = {2020},\n\tnote = {\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201911385},\n\tkeywords = {colloidal nanoparticles, copper selenophosphate, hard–soft acid–base principle, reaction pathways},\n\tpages = {3038--3042},\n\tfile = {Lee et al_2020_A Directed Route to Colloidal Nanoparticle Synthesis of the Copper.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\A Directed Route to Colloidal Nanoparticle Synthesis of the Copper_2020\\\\Lee et al_2020_A Directed Route to Colloidal Nanoparticle Synthesis of the Copper.pdf:application/pdf},\n}\n\n
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\n The first colloidal nanoparticle synthesis of the copper selenophosphate Cu3PSe4, a promising new material for photovoltaics, is reported. Because the formation of binary copper selenide impurities seemed to form more readily, two approaches were developed to install phosphorus bonds directly: 1) the synthesis of molecular P4Se3 and subsequent reaction with a copper precursor, (P-Se)+Cu, and 2) the synthesis of copper phosphide, Cu3P, nanoparticles and subsequent reaction with a selenium precursor, (Cu-P)+Se. The isolation and purification of Cu3P nanoparticles and subsequent selenization yielded phase-pure Cu3PSe4. Solvent effects and Se precursor reactivities were elucidated and were key to understanding the final reaction conditions.\n
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\n  \n 2019\n \n \n (3)\n \n \n
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\n \n\n \n \n \n \n \n \n The development of strategies for nanoparticle synthesis: Considerations for deepening understanding of inherently complex systems.\n \n \n \n \n\n\n \n Lee, J. M.; Miller, R. C.; Moloney, L. J.; and Prieto, A. L.\n\n\n \n\n\n\n Journal of Solid State Chemistry, 273: 243–286. May 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{lee_development_2019,\n\ttitle = {The development of strategies for nanoparticle synthesis: {Considerations} for deepening understanding of inherently complex systems},\n\tvolume = {273},\n\tissn = {0022-4596},\n\tshorttitle = {The development of strategies for nanoparticle synthesis},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0022459618305954},\n\tdoi = {10.1016/j.jssc.2018.12.053},\n\tabstract = {The last fifty years of solid-state chemistry have produced a wealth of compounds with complex structures, exciting properties, and from those discoveries, an explosion of new technologies. We continue to strive to understand structure-property relationships as well as develop expedient methods to discover and control new materials. Nanoparticle synthesis is one area of synthetic solid-state chemistry that is currently experiencing a significant growth of deepening understanding and increasing sophistication. Herein, we review examples from the literature where insight about a synthesis can be built from to catalyze new discoveries. The focus is on synthetic reports of nanoparticles of increasing complexity.},\n\turldate = {2023-11-20},\n\tjournal = {Journal of Solid State Chemistry},\n\tauthor = {Lee, Jennifer M. and Miller, Rebecca C. and Moloney, Lily J. and Prieto, Amy L.},\n\tmonth = may,\n\tyear = {2019},\n\tpages = {243--286},\n\tfile = {Lee et al_2019_The development of strategies for nanoparticle synthesis.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\The development of strategies for nanoparticle synthesis_2019\\\\Lee et al_2019_The development of strategies for nanoparticle synthesis2.pdf:application/pdf},\n}\n\n
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\n The last fifty years of solid-state chemistry have produced a wealth of compounds with complex structures, exciting properties, and from those discoveries, an explosion of new technologies. We continue to strive to understand structure-property relationships as well as develop expedient methods to discover and control new materials. Nanoparticle synthesis is one area of synthetic solid-state chemistry that is currently experiencing a significant growth of deepening understanding and increasing sophistication. Herein, we review examples from the literature where insight about a synthesis can be built from to catalyze new discoveries. The focus is on synthetic reports of nanoparticles of increasing complexity.\n
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\n \n\n \n \n \n \n \n \n Ambient Surface Stability of Thin Film Nanocrystalline Cu3SbSe4 and Structure–Property Relationships.\n \n \n \n \n\n\n \n Agocs, D. B.; Danna, T.; and Prieto, A. L.\n\n\n \n\n\n\n ACS Appl. Energy Mater., 2(3): 1903–1910. March 2019.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"AmbientPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{agocs_ambient_2019,\n\ttitle = {Ambient {Surface} {Stability} of {Thin} {Film} {Nanocrystalline} {Cu3SbSe4} and {Structure}–{Property} {Relationships}},\n\tvolume = {2},\n\turl = {https://doi.org/10.1021/acsaem.8b02019},\n\tdoi = {10.1021/acsaem.8b02019},\n\tabstract = {Nanocrystalline materials have a high surface area and hence may be significantly more reactive than their bulk counterparts under ambient conditions. This may affect device function in unexpected ways. Here, high-quality crystalline Cu3SbSe4 nanocrystals are synthesized through a hot injection route, and thin films are deposited through a ligand exchange procedure. The electronic conductivity of the films increases significantly upon exposure to air, up to 80 Ω–1 cm–1. This increase in conductivity is correlated to a surface oxidation as observed by XPS. The observed changes in the film upon exposure to ambient conditions are suggested to be critical for understanding the properties of these materials as they are incorporated into devices.},\n\tnumber = {3},\n\turldate = {2023-11-20},\n\tjournal = {ACS Appl. Energy Mater.},\n\tauthor = {Agocs, Daniel B. and Danna, Trenton and Prieto, Amy L.},\n\tmonth = mar,\n\tyear = {2019},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {1903--1910},\n\tfile = {Agocs et al_2019_Ambient Surface Stability of Thin Film Nanocrystalline Cu3SbSe4 and.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Ambient Surface Stability of Thin Film Nanocrystalline Cu3SbSe4 and_2019\\\\Agocs et al_2019_Ambient Surface Stability of Thin Film Nanocrystalline Cu3SbSe4 and.pdf:application/pdf},\n}\n\n
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\n Nanocrystalline materials have a high surface area and hence may be significantly more reactive than their bulk counterparts under ambient conditions. This may affect device function in unexpected ways. Here, high-quality crystalline Cu3SbSe4 nanocrystals are synthesized through a hot injection route, and thin films are deposited through a ligand exchange procedure. The electronic conductivity of the films increases significantly upon exposure to air, up to 80 Ω–1 cm–1. This increase in conductivity is correlated to a surface oxidation as observed by XPS. The observed changes in the film upon exposure to ambient conditions are suggested to be critical for understanding the properties of these materials as they are incorporated into devices.\n
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\n \n\n \n \n \n \n \n \n Electrodeposition of pure phase SnSb exhibiting high stability as a sodium-ion battery anode.\n \n \n \n \n\n\n \n Ma, J.; and L. Prieto, A.\n\n\n \n\n\n\n Chemical Communications, 55(48): 6938–6941. 2019.\n Publisher: Royal Society of Chemistry\n\n\n\n
\n\n\n\n \n \n \"ElectrodepositionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{ma_electrodeposition_2019,\n\ttitle = {Electrodeposition of pure phase {SnSb} exhibiting high stability as a sodium-ion battery anode},\n\tvolume = {55},\n\turl = {https://pubs.rsc.org/en/content/articlelanding/2019/cc/c9cc00001a},\n\tdoi = {10.1039/C9CC00001A},\n\tlanguage = {en},\n\tnumber = {48},\n\turldate = {2023-11-20},\n\tjournal = {Chemical Communications},\n\tauthor = {Ma, Jeffrey and L. Prieto, Amy},\n\tyear = {2019},\n\tnote = {Publisher: Royal Society of Chemistry},\n\tpages = {6938--6941},\n\tfile = {Ma_L. Prieto_2019_Electrodeposition of pure phase SnSb exhibiting high stability as a sodium-ion.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Electrodeposition of pure phase SnSb exhibiting high stability as a sodium-ion_2019\\\\Ma_L. Prieto_2019_Electrodeposition of pure phase SnSb exhibiting high stability as a sodium-ion.pdf:application/pdf},\n}\n\n
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\n  \n 2018\n \n \n (2)\n \n \n
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\n \n\n \n \n \n \n \n \n Synthetic Control of Quinary Nanocrystals of a Photovoltaic Material: The Clear Role of Chalcogen Ratio on Light Absorption and Charge Transport for Cu2–xZn1+xSn(S1–ySey)4.\n \n \n \n \n\n\n \n Braun, M. B.; Korala, L.; Kephart, J. M.; and Prieto, A. L.\n\n\n \n\n\n\n ACS Appl. Energy Mater., 1(3): 1053–1059. March 2018.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"SyntheticPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{braun_synthetic_2018,\n\ttitle = {Synthetic {Control} of {Quinary} {Nanocrystals} of a {Photovoltaic} {Material}: {The} {Clear} {Role} of {Chalcogen} {Ratio} on {Light} {Absorption} and {Charge} {Transport} for {Cu2}–{xZn1}+{xSn}({S1}–{ySey})4},\n\tvolume = {1},\n\tshorttitle = {Synthetic {Control} of {Quinary} {Nanocrystals} of a {Photovoltaic} {Material}},\n\turl = {https://doi.org/10.1021/acsaem.7b00198},\n\tdoi = {10.1021/acsaem.7b00198},\n\tabstract = {Photovoltaic (PV) devices based on bulk polycrystalline Cu2ZnSn(S1–xSex)4 (CZTSSe) as the absorber material have historically shown the best efficiency with high Se compositions. The selenization process, which is employed in the formation of absorber layer, has been shown to result in maximum device efficiency at a lower than predicted optimal band gap (Eg= ∼1.1 eV as compared to the 1.34 eV predicted by the Shockley–Queisser detailed balance model). It is still not clear if this deviation is due to changes in the chalcogen composition, grain growth in the film, or increased order in the lattice. In contrast, CZTSSe nanocrystals (NCs) offer a unique opportunity to evaluate the effect of chalcogen ratio on light absorption, charge transport, and photovoltaic performance excluding the impact of the uncertain effects of the conventional selenization step and, importantly, offer a potential path to a dramatic reduction in PV manufacturing cost. Despite an abundance of literature reports on this compound, there is to date no systematic study of the effects of controlled composition of the chalcogen on photocarrier generation and extraction at an optimal and constant cation ratio in a single system. This is required to determine the interplay between light absorbance and transport without compositional convolution and, in turn, to identify the best chalcogen ratio for the unannealed NC PV devices. Here we show that the entire family of Cu2–zZn1+zSn(S1–ySey)4 NCs can be made by a simple one-pot synthetic method with exquisite control over cation content and particle size across the entire range of chalcogen compositions. These NCs are then used to make solution-processed and electrically conductive CZTSSe NC films in the full range of S/(S + Se) ratios via ligand exchange without postdeposition annealing. The transport properties assessed by Hall-effect measurements revealed an intrinsic increase in film conductivity with selenium incorporation. These measurements are then correlated with the PV performance at the full range of band gaps (Eg = 1.0–1.5 eV), leading to an observed maximum in power conversion efficiency centered around Eg = 1.30 eV, which is much closer to the predicted Shockley–Queisser optimal band gap, an outcome predominantly dictated by the compromise between electrical conductivity and band gap.},\n\tnumber = {3},\n\turldate = {2023-11-20},\n\tjournal = {ACS Appl. Energy Mater.},\n\tauthor = {Braun, Max B. and Korala, Lasantha and Kephart, Jason M. and Prieto, Amy L.},\n\tmonth = mar,\n\tyear = {2018},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {1053--1059},\n\tfile = {Braun et al_2018_Synthetic Control of Quinary Nanocrystals of a Photovoltaic Material.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Synthetic Control of Quinary Nanocrystals of a Photovoltaic Material_2018\\\\Braun et al_2018_Synthetic Control of Quinary Nanocrystals of a Photovoltaic Material2.pdf:application/pdf},\n}\n\n
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\n Photovoltaic (PV) devices based on bulk polycrystalline Cu2ZnSn(S1–xSex)4 (CZTSSe) as the absorber material have historically shown the best efficiency with high Se compositions. The selenization process, which is employed in the formation of absorber layer, has been shown to result in maximum device efficiency at a lower than predicted optimal band gap (Eg= ∼1.1 eV as compared to the 1.34 eV predicted by the Shockley–Queisser detailed balance model). It is still not clear if this deviation is due to changes in the chalcogen composition, grain growth in the film, or increased order in the lattice. In contrast, CZTSSe nanocrystals (NCs) offer a unique opportunity to evaluate the effect of chalcogen ratio on light absorption, charge transport, and photovoltaic performance excluding the impact of the uncertain effects of the conventional selenization step and, importantly, offer a potential path to a dramatic reduction in PV manufacturing cost. Despite an abundance of literature reports on this compound, there is to date no systematic study of the effects of controlled composition of the chalcogen on photocarrier generation and extraction at an optimal and constant cation ratio in a single system. This is required to determine the interplay between light absorbance and transport without compositional convolution and, in turn, to identify the best chalcogen ratio for the unannealed NC PV devices. Here we show that the entire family of Cu2–zZn1+zSn(S1–ySey)4 NCs can be made by a simple one-pot synthetic method with exquisite control over cation content and particle size across the entire range of chalcogen compositions. These NCs are then used to make solution-processed and electrically conductive CZTSSe NC films in the full range of S/(S + Se) ratios via ligand exchange without postdeposition annealing. The transport properties assessed by Hall-effect measurements revealed an intrinsic increase in film conductivity with selenium incorporation. These measurements are then correlated with the PV performance at the full range of band gaps (Eg = 1.0–1.5 eV), leading to an observed maximum in power conversion efficiency centered around Eg = 1.30 eV, which is much closer to the predicted Shockley–Queisser optimal band gap, an outcome predominantly dictated by the compromise between electrical conductivity and band gap.\n
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\n \n\n \n \n \n \n \n \n Electrodeposited thin-film Cu x Sb anodes for Li-ion batteries: enhancement of cycle life via tuning of film composition and engineering of the film-substrate interface.\n \n \n \n \n\n\n \n C. Schulze, M.; K. Schulze, R.; and L. Prieto, A.\n\n\n \n\n\n\n Journal of Materials Chemistry A, 6(26): 12708–12717. 2018.\n Publisher: Royal Society of Chemistry\n\n\n\n
\n\n\n\n \n \n \"ElectrodepositedPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{cschulze_electrodeposited_2018,\n\ttitle = {Electrodeposited thin-film {Cu} x {Sb} anodes for {Li}-ion batteries: enhancement of cycle life via tuning of film composition and engineering of the film-substrate interface},\n\tvolume = {6},\n\tshorttitle = {Electrodeposited thin-film {Cu} x {Sb} anodes for {Li}-ion batteries},\n\turl = {https://pubs.rsc.org/en/content/articlelanding/2018/ta/c8ta01798k},\n\tdoi = {10.1039/C8TA01798K},\n\tabstract = {Electrodeposited Cu–Sb thin films on Cu and Ni substrates are investigated as alloy anodes for Li-ion batteries to elucidate the effects of both the film composition and substrate interactions on anode cycling stability and lifetime. Thin films of composition CuxSb (0 {\\textless} x {\\textless} 2) exhibit the longest cycle lifetimes nearest x = 1. Additionally, the Cu–Sb films exhibit shorter cycle lifetimes when electrodeposited onto Cu substrates when compared to equivalent films on Ni substrates. Ex situ characterization and differential capacity analysis of the anodes reveal that significant interdiffusion occurs during cycling between pure Sb films and Cu substrates. The great extent of interdiffusion results in mechanical weakening of the film–substrate interface that exacerbates film delamination and decreases cycle lifetimes of Cu–Sb films on Cu substrates regardless of the film's composition. The results presented here demonstrate that the composition of the anode alone is not the most important predictor of long term cycle stability; the composition coupled with the identity of the substrate is key. These interactions are critical to understand in the design of high capacity, large volume change materials fabricated without the need for additional binders.},\n\tlanguage = {en},\n\tnumber = {26},\n\turldate = {2023-11-20},\n\tjournal = {Journal of Materials Chemistry A},\n\tauthor = {C. Schulze, Maxwell and K. Schulze, Roland and L. Prieto, Amy},\n\tyear = {2018},\n\tnote = {Publisher: Royal Society of Chemistry},\n\tpages = {12708--12717},\n\tfile = {C. Schulze et al_2018_Electrodeposited thin-film Cu x Sb anodes for Li-ion batteries.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Electrodeposited thin-film Cu x Sb anodes for Li-ion batteries_2018\\\\C. Schulze et al_2018_Electrodeposited thin-film Cu x Sb anodes for Li-ion batteries.pdf:application/pdf},\n}\n\n
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\n Electrodeposited Cu–Sb thin films on Cu and Ni substrates are investigated as alloy anodes for Li-ion batteries to elucidate the effects of both the film composition and substrate interactions on anode cycling stability and lifetime. Thin films of composition CuxSb (0 \\textless x \\textless 2) exhibit the longest cycle lifetimes nearest x = 1. Additionally, the Cu–Sb films exhibit shorter cycle lifetimes when electrodeposited onto Cu substrates when compared to equivalent films on Ni substrates. Ex situ characterization and differential capacity analysis of the anodes reveal that significant interdiffusion occurs during cycling between pure Sb films and Cu substrates. The great extent of interdiffusion results in mechanical weakening of the film–substrate interface that exacerbates film delamination and decreases cycle lifetimes of Cu–Sb films on Cu substrates regardless of the film's composition. The results presented here demonstrate that the composition of the anode alone is not the most important predictor of long term cycle stability; the composition coupled with the identity of the substrate is key. These interactions are critical to understand in the design of high capacity, large volume change materials fabricated without the need for additional binders.\n
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\n  \n 2017\n \n \n (1)\n \n \n
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\n \n\n \n \n \n \n \n \n Ligand-Exchanged CZTS Nanocrystal Thin Films: Does Nanocrystal Surface Passivation Effectively Improve Photovoltaic Performance?.\n \n \n \n \n\n\n \n Korala, L.; Braun, M. B.; Kephart, J. M.; Tregillus, Z.; and Prieto, A. L.\n\n\n \n\n\n\n Chem. Mater., 29(16): 6621–6629. August 2017.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"Ligand-ExchangedPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{korala_ligand-exchanged_2017,\n\ttitle = {Ligand-{Exchanged} {CZTS} {Nanocrystal} {Thin} {Films}: {Does} {Nanocrystal} {Surface} {Passivation} {Effectively} {Improve} {Photovoltaic} {Performance}?},\n\tvolume = {29},\n\tissn = {0897-4756},\n\tshorttitle = {Ligand-{Exchanged} {CZTS} {Nanocrystal} {Thin} {Films}},\n\turl = {https://doi.org/10.1021/acs.chemmater.7b00541},\n\tdoi = {10.1021/acs.chemmater.7b00541},\n\tabstract = {Nanocrystal (NC) Cu2ZnSnS4 (CZTS) solar cells, composed of a nontoxic and earth abundant absorber material, have great potential in low-cost solar energy harvesting. However, CZTS NC films typically must be thermally annealed at elevated temperatures and under harsh environments to produce high-efficiency devices. The efficiencies of unannealed CZTS NC solar cells have been hampered by low open circuit potentials (Voc, {\\textless}325 mV) and low short circuit current densities (Jsc, {\\textless}2 mA), primarily because of the incomplete passivation of the crystal surface. Although great progress has been made in understanding the surface chemistry of II–VI and IV–VI semiconductor NCs, the surface chemistry of complex quaternary CZTS NCs is largely unexplored. Here, for the first time, we report a comprehensive study of the surface chemistry of CZTS NCs focusing on depositing ligand-passivated, uniform NC thin films to address the issue of large Voc deficit and low current collection efficiency typically observed for CZTS NC solar cells. The ligand exchange reactions were rationally designed to target each metal ion on the surface [using both organic L-type ligands such as ethylenediamine and inorganic X-type ligands (I– and S2–)] and to passivate anionic chalcogen sites with inorganic Z-type ligands (ZnCl2). Herein, we show that CZTS/CdS heterojunction NC solar cells made of uniformly passivated CZTS NCs demonstrate a {\\textgreater}180 mV improvement in Voc. Furthermore, the influence of device configuration on the collection efficiency of photogenerated carriers in the CZTS NC absorber layer is presented, and the implications of both surface and internal defects in CZTS NCs for photovoltaic performance are discussed.},\n\tnumber = {16},\n\turldate = {2023-11-20},\n\tjournal = {Chem. Mater.},\n\tauthor = {Korala, Lasantha and Braun, Max B. and Kephart, Jason M. and Tregillus, Zoë and Prieto, Amy L.},\n\tmonth = aug,\n\tyear = {2017},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {6621--6629},\n\tfile = {Korala et al_2017_Ligand-Exchanged CZTS Nanocrystal Thin Films.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Ligand-Exchanged CZTS Nanocrystal Thin Films_2017\\\\Korala et al_2017_Ligand-Exchanged CZTS Nanocrystal Thin Films2.pdf:application/pdf},\n}\n\n
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\n Nanocrystal (NC) Cu2ZnSnS4 (CZTS) solar cells, composed of a nontoxic and earth abundant absorber material, have great potential in low-cost solar energy harvesting. However, CZTS NC films typically must be thermally annealed at elevated temperatures and under harsh environments to produce high-efficiency devices. The efficiencies of unannealed CZTS NC solar cells have been hampered by low open circuit potentials (Voc, \\textless325 mV) and low short circuit current densities (Jsc, \\textless2 mA), primarily because of the incomplete passivation of the crystal surface. Although great progress has been made in understanding the surface chemistry of II–VI and IV–VI semiconductor NCs, the surface chemistry of complex quaternary CZTS NCs is largely unexplored. Here, for the first time, we report a comprehensive study of the surface chemistry of CZTS NCs focusing on depositing ligand-passivated, uniform NC thin films to address the issue of large Voc deficit and low current collection efficiency typically observed for CZTS NC solar cells. The ligand exchange reactions were rationally designed to target each metal ion on the surface [using both organic L-type ligands such as ethylenediamine and inorganic X-type ligands (I– and S2–)] and to passivate anionic chalcogen sites with inorganic Z-type ligands (ZnCl2). Herein, we show that CZTS/CdS heterojunction NC solar cells made of uniformly passivated CZTS NCs demonstrate a \\textgreater180 mV improvement in Voc. Furthermore, the influence of device configuration on the collection efficiency of photogenerated carriers in the CZTS NC absorber layer is presented, and the implications of both surface and internal defects in CZTS NCs for photovoltaic performance are discussed.\n
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\n  \n 2016\n \n \n (3)\n \n \n
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\n \n\n \n \n \n \n \n \n Copper Antimonide Nanowire Array Lithium Ion Anodes Stabilized by Electrolyte Additives.\n \n \n \n \n\n\n \n Jackson, E. D.; and Prieto, A. L.\n\n\n \n\n\n\n ACS Appl. Mater. Interfaces, 8(44): 30379–30386. November 2016.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"CopperPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{jackson_copper_2016,\n\ttitle = {Copper {Antimonide} {Nanowire} {Array} {Lithium} {Ion} {Anodes} {Stabilized} by {Electrolyte} {Additives}},\n\tvolume = {8},\n\tissn = {1944-8244},\n\turl = {https://doi.org/10.1021/acsami.6b08033},\n\tdoi = {10.1021/acsami.6b08033},\n\tabstract = {Nanowires of electrochemically active electrode materials for lithium ion batteries represent a unique system that allows for intensive investigations of surface phenomena. In particular, highly ordered nanowire arrays produced by electrodeposition into anodic aluminum oxide templates can lead to new insights into a material’s electrochemical performance by providing a high-surface-area electrode with negligible volume expansion induced pulverization. Here we show that for the Li–CuxSb ternary system, stabilizing the surface chemistry is the most critical factor for promoting long electrode life. The resulting solid electrolyte interphase is analyzed using a mix of electron microscopy, X-ray photoelectron spectroscopy, and lithium ion battery half-cell testing to provide a better understanding of the importance of electrolyte composition on this multicomponent alloy anode material.},\n\tnumber = {44},\n\turldate = {2023-11-20},\n\tjournal = {ACS Appl. Mater. Interfaces},\n\tauthor = {Jackson, Everett D. and Prieto, Amy L.},\n\tmonth = nov,\n\tyear = {2016},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {30379--30386},\n\tfile = {Jackson_Prieto_2016_Copper Antimonide Nanowire Array Lithium Ion Anodes Stabilized by Electrolyte.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Copper Antimonide Nanowire Array Lithium Ion Anodes Stabilized by Electrolyte_2016\\\\Jackson_Prieto_2016_Copper Antimonide Nanowire Array Lithium Ion Anodes Stabilized by Electrolyte2.pdf:application/pdf},\n}\n\n
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\n\n\n
\n Nanowires of electrochemically active electrode materials for lithium ion batteries represent a unique system that allows for intensive investigations of surface phenomena. In particular, highly ordered nanowire arrays produced by electrodeposition into anodic aluminum oxide templates can lead to new insights into a material’s electrochemical performance by providing a high-surface-area electrode with negligible volume expansion induced pulverization. Here we show that for the Li–CuxSb ternary system, stabilizing the surface chemistry is the most critical factor for promoting long electrode life. The resulting solid electrolyte interphase is analyzed using a mix of electron microscopy, X-ray photoelectron spectroscopy, and lithium ion battery half-cell testing to provide a better understanding of the importance of electrolyte composition on this multicomponent alloy anode material.\n
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\n \n\n \n \n \n \n \n \n Evaluation of the Electrochemical Properties of Crystalline Copper Antimonide Thin Film Anodes for Lithium Ion Batteries Produced by Single Step Electrodeposition.\n \n \n \n \n\n\n \n Jackson, E. D.; Mosby, J. M.; and Prieto, A. L.\n\n\n \n\n\n\n Electrochimica Acta, 214: 253–264. October 2016.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n\n\n\n
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@article{jackson_evaluation_2016,\n\ttitle = {Evaluation of the {Electrochemical} {Properties} of {Crystalline} {Copper} {Antimonide} {Thin} {Film} {Anodes} for {Lithium} {Ion} {Batteries} {Produced} by {Single} {Step} {Electrodeposition}},\n\tvolume = {214},\n\tissn = {0013-4686},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0013468616316449},\n\tdoi = {10.1016/j.electacta.2016.07.126},\n\tabstract = {Electrodeposited crystalline Cu2Sb thin films are studied to evaluate the use of these electrodes as model systems for studying Cu2Sb as a lithium ion battery anode material. The films have been characterized with an emphasis on determining the film quality and relating the structure, composition, and morphology to the resulting electrochemical and morphological transformations that occur during electrochemical lithiation and delithiation. It is shown that electrodeposition can produce high quality films that are devoid of major defects and can be used to provide mechanistic insight on the electrochemistry of reversible lithium alloying. The CuxSb films show that the fundamental reaction mechanism remains largely unchanged for copper concentrations of 1{\\textgreater}x{\\textgreater}3. For the first time we show that the copper concentration greatly affects critical criteria for anode materials such as the initial coulombic efficiency and reversible capacity of the electrode material. Voltage limit experiments show that an overpotential is required to remove trapped lithium states. Additional ex-situ experiments reveal that internal strain created during the lithiation process is relieved by buckling, greatly altering the film surface area and geometry, and resulting in the formation of cracks upon delithiation. This process is only semi-reversible, and strained areas remain visible even when discharged outside the voltage window of Cu2Sb determined by differential capacity plots. The results presented here indicate that these electroplated thin films are useful as analytical tools for showing pathways to improving the performance and fundamental understanding of alloy based lithium-ion battery anodes.},\n\turldate = {2023-11-20},\n\tjournal = {Electrochimica Acta},\n\tauthor = {Jackson, Everett D. and Mosby, James M. and Prieto, Amy L.},\n\tmonth = oct,\n\tyear = {2016},\n\tkeywords = {Alloy anode, Copper antimonide, Thin film electrode},\n\tpages = {253--264},\n\tfile = {Jackson et al_2016_Evaluation of the Electrochemical Properties of Crystalline Copper Antimonide.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Evaluation of the Electrochemical Properties of Crystalline Copper Antimonide_2016\\\\Jackson et al_2016_Evaluation of the Electrochemical Properties of Crystalline Copper Antimonide2.pdf:application/pdf},\n}\n\n
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\n Electrodeposited crystalline Cu2Sb thin films are studied to evaluate the use of these electrodes as model systems for studying Cu2Sb as a lithium ion battery anode material. The films have been characterized with an emphasis on determining the film quality and relating the structure, composition, and morphology to the resulting electrochemical and morphological transformations that occur during electrochemical lithiation and delithiation. It is shown that electrodeposition can produce high quality films that are devoid of major defects and can be used to provide mechanistic insight on the electrochemistry of reversible lithium alloying. The CuxSb films show that the fundamental reaction mechanism remains largely unchanged for copper concentrations of 1\\textgreaterx\\textgreater3. For the first time we show that the copper concentration greatly affects critical criteria for anode materials such as the initial coulombic efficiency and reversible capacity of the electrode material. Voltage limit experiments show that an overpotential is required to remove trapped lithium states. Additional ex-situ experiments reveal that internal strain created during the lithiation process is relieved by buckling, greatly altering the film surface area and geometry, and resulting in the formation of cracks upon delithiation. This process is only semi-reversible, and strained areas remain visible even when discharged outside the voltage window of Cu2Sb determined by differential capacity plots. The results presented here indicate that these electroplated thin films are useful as analytical tools for showing pathways to improving the performance and fundamental understanding of alloy based lithium-ion battery anodes.\n
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\n \n\n \n \n \n \n \n \n Enhanced Conductivity in CZTS/Cu2–xSe Nanocrystal Thin Films: Growth of a Conductive Shell.\n \n \n \n \n\n\n \n Korala, L.; McGoffin, J. T.; and Prieto, A. L.\n\n\n \n\n\n\n ACS Appl. Mater. Interfaces, 8(7): 4911–4917. February 2016.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"EnhancedPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{korala_enhanced_2016,\n\ttitle = {Enhanced {Conductivity} in {CZTS}/{Cu2}–{xSe} {Nanocrystal} {Thin} {Films}: {Growth} of a {Conductive} {Shell}},\n\tvolume = {8},\n\tissn = {1944-8244},\n\tshorttitle = {Enhanced {Conductivity} in {CZTS}/{Cu2}–{xSe} {Nanocrystal} {Thin} {Films}},\n\turl = {https://doi.org/10.1021/acsami.5b11037},\n\tdoi = {10.1021/acsami.5b11037},\n\tabstract = {Poor charge transport in Cu2ZnSnS4 (CZTS) nanocrystal (NC) thin films presents a great challenge in the fabrication of solar cells without postannealing treatments. We introduce a novel approach to facilitate the charge carrier hopping between CZTS NCs by growing a stoichiometric Cu2Se shell that can be oxidized to form a conductive Cu2–xSe phase when exposed to air. The CZTS/Cu2Se core/shell NCs with varying numbers of shell monolayers were synthesized by the successive ionic layer adsorption and reaction (SILAR) method, and the variation in structural and optical properties of the CZTS NCs with varying shell thicknesses was investigated. Solid-phase sulfide ligand exchange was employed to fabricate NC thin films by layer-by-layer dip coating and a 2 orders of magnitude rise in dark conductivity (∼10–3 S cm–1 at 0 monolayer and ∼10–1 S cm–1 at 1.5 monolayers) was observed with an increase in the number of shell monolayers. The approach described herein is the first key step in achieving a significant increase in the photoconductivity of as-deposited CZTS NC thin films.},\n\tnumber = {7},\n\turldate = {2023-11-20},\n\tjournal = {ACS Appl. Mater. Interfaces},\n\tauthor = {Korala, Lasantha and McGoffin, J. Tyler and Prieto, Amy L.},\n\tmonth = feb,\n\tyear = {2016},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {4911--4917},\n\tfile = {Korala et al_2016_Enhanced Conductivity in CZTS-Cu2–xSe Nanocrystal Thin Films.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Enhanced Conductivity in CZTS-Cu2–xSe Nanocrystal Thin Films_2016\\\\Korala et al_2016_Enhanced Conductivity in CZTS-Cu2–xSe Nanocrystal Thin Films2.pdf:application/pdf},\n}\n\n
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\n Poor charge transport in Cu2ZnSnS4 (CZTS) nanocrystal (NC) thin films presents a great challenge in the fabrication of solar cells without postannealing treatments. We introduce a novel approach to facilitate the charge carrier hopping between CZTS NCs by growing a stoichiometric Cu2Se shell that can be oxidized to form a conductive Cu2–xSe phase when exposed to air. The CZTS/Cu2Se core/shell NCs with varying numbers of shell monolayers were synthesized by the successive ionic layer adsorption and reaction (SILAR) method, and the variation in structural and optical properties of the CZTS NCs with varying shell thicknesses was investigated. Solid-phase sulfide ligand exchange was employed to fabricate NC thin films by layer-by-layer dip coating and a 2 orders of magnitude rise in dark conductivity (∼10–3 S cm–1 at 0 monolayer and ∼10–1 S cm–1 at 1.5 monolayers) was observed with an increase in the number of shell monolayers. The approach described herein is the first key step in achieving a significant increase in the photoconductivity of as-deposited CZTS NC thin films.\n
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\n  \n 2015\n \n \n (1)\n \n \n
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\n \n\n \n \n \n \n \n \n Electrochemical Performance of Electrodeposited Zn4Sb3 Films for Sodium-Ion Secondary Battery Anodes.\n \n \n \n \n\n\n \n Jackson, E. D.; Green, S.; and Prieto, A. L.\n\n\n \n\n\n\n ACS Appl. Mater. Interfaces, 7(14): 7447–7450. April 2015.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"ElectrochemicalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{jackson_electrochemical_2015,\n\ttitle = {Electrochemical {Performance} of {Electrodeposited} {Zn4Sb3} {Films} for {Sodium}-{Ion} {Secondary} {Battery} {Anodes}},\n\tvolume = {7},\n\tissn = {1944-8244},\n\turl = {https://doi.org/10.1021/am507436u},\n\tdoi = {10.1021/am507436u},\n\tabstract = {We report the electrodeposition of zinc–antimony composite films from aqueous solution. We show that it is possible to produce Zn4Sb3 films on zinc substrates by low-temperature annealing and we evaluate their performance as sodium-ion battery anodes. Near complete utilization of the antimony ({\\textgreater}90\\%) during cycling, good cycle life ({\\textgreater}250 cycles), and high rate performance is demonstrated for Zn4Sb3 thin films. Interestingly, when Zn4Sb3 transforms in situ to an amorphous zinc–antimony composite, it shows superior performance to zinc–antimony composites that are initially amorphous. This demonstrates the importance of the initial electrode structure on promoting the sodium alloying reaction.},\n\tnumber = {14},\n\turldate = {2023-11-20},\n\tjournal = {ACS Appl. Mater. Interfaces},\n\tauthor = {Jackson, E. D. and Green, S. and Prieto, A. L.},\n\tmonth = apr,\n\tyear = {2015},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {7447--7450},\n\tfile = {Jackson et al_2015_Electrochemical Performance of Electrodeposited Zn4Sb3 Films for Sodium-Ion.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Electrochemical Performance of Electrodeposited Zn4Sb3 Films for Sodium-Ion_2015\\\\Jackson et al_2015_Electrochemical Performance of Electrodeposited Zn4Sb3 Films for Sodium-Ion2.pdf:application/pdf},\n}\n\n
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\n We report the electrodeposition of zinc–antimony composite films from aqueous solution. We show that it is possible to produce Zn4Sb3 films on zinc substrates by low-temperature annealing and we evaluate their performance as sodium-ion battery anodes. Near complete utilization of the antimony (\\textgreater90%) during cycling, good cycle life (\\textgreater250 cycles), and high rate performance is demonstrated for Zn4Sb3 thin films. Interestingly, when Zn4Sb3 transforms in situ to an amorphous zinc–antimony composite, it shows superior performance to zinc–antimony composites that are initially amorphous. This demonstrates the importance of the initial electrode structure on promoting the sodium alloying reaction.\n
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\n  \n 2014\n \n \n (1)\n \n \n
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\n \n\n \n \n \n \n \n \n Synthesis and Characterization of Diazonium Salts with Polyethylene Glycol Appendages and Resulting Films Afforded by Electrodeposition for Use as a Battery Separator Material.\n \n \n \n \n\n\n \n Bates, D. J.; Elliott, C. M.; and Prieto, A. L.\n\n\n \n\n\n\n Chem. Mater., 26(19): 5514–5522. October 2014.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"SynthesisPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{bates_synthesis_2014,\n\ttitle = {Synthesis and {Characterization} of {Diazonium} {Salts} with {Polyethylene} {Glycol} {Appendages} and {Resulting} {Films} {Afforded} by {Electrodeposition} for {Use} as a {Battery} {Separator} {Material}},\n\tvolume = {26},\n\tissn = {0897-4756},\n\turl = {https://doi.org/10.1021/cm501482h},\n\tdoi = {10.1021/cm501482h},\n\tabstract = {The coating of three-dimensional nanostructured electrodes is a significant challenge for the future of many energy storage devices and, if successful, could profoundly increase battery power. The synthesis of a new class of monomers that can be electrochemically polymerized is a key first step in affording a conformally coated, nanoscale lithium-ion battery separator and is presented herein. Characterization of the monomers was accomplished via nuclear magnetic resonance and infrared spectroscopy. Planar films electrodeposited from the monomers were characterized using redox probe experiments and impedance spectroscopy. The films are chemically grafted to the underlying substrate (conformal, pinhole free, {\\textless}10 nm thick) and exhibit electrical resistivity values as high as 28000 MΩ/cm.},\n\tnumber = {19},\n\turldate = {2023-11-20},\n\tjournal = {Chem. Mater.},\n\tauthor = {Bates, Daniel J. and Elliott, C. Michael and Prieto, Amy L.},\n\tmonth = oct,\n\tyear = {2014},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {5514--5522},\n\tfile = {Bates et al_2014_Synthesis and Characterization of Diazonium Salts with Polyethylene Glycol.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Synthesis and Characterization of Diazonium Salts with Polyethylene Glycol_2014\\\\Bates et al_2014_Synthesis and Characterization of Diazonium Salts with Polyethylene Glycol.pdf:application/pdf},\n}\n\n
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\n The coating of three-dimensional nanostructured electrodes is a significant challenge for the future of many energy storage devices and, if successful, could profoundly increase battery power. The synthesis of a new class of monomers that can be electrochemically polymerized is a key first step in affording a conformally coated, nanoscale lithium-ion battery separator and is presented herein. Characterization of the monomers was accomplished via nuclear magnetic resonance and infrared spectroscopy. Planar films electrodeposited from the monomers were characterized using redox probe experiments and impedance spectroscopy. The films are chemically grafted to the underlying substrate (conformal, pinhole free, \\textless10 nm thick) and exhibit electrical resistivity values as high as 28000 MΩ/cm.\n
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\n  \n 2013\n \n \n (1)\n \n \n
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\n \n\n \n \n \n \n \n \n Solution Synthesis and Reactivity of Colloidal Fe2GeS4: A Potential Candidate for Earth Abundant, Nanostructured Photovoltaics.\n \n \n \n \n\n\n \n Fredrick, S. J.; and Prieto, A. L.\n\n\n \n\n\n\n J. Am. Chem. Soc., 135(49): 18256–18259. December 2013.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"SolutionPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{fredrick_solution_2013,\n\ttitle = {Solution {Synthesis} and {Reactivity} of {Colloidal} {Fe2GeS4}: {A} {Potential} {Candidate} for {Earth} {Abundant}, {Nanostructured} {Photovoltaics}},\n\tvolume = {135},\n\tissn = {0002-7863},\n\tshorttitle = {Solution {Synthesis} and {Reactivity} of {Colloidal} {Fe2GeS4}},\n\turl = {https://doi.org/10.1021/ja408333y},\n\tdoi = {10.1021/ja408333y},\n\tabstract = {Iron chalcogenides, in particular iron pyrite, have great potential to be useful materials for cost-effective thin film photovoltaics. However, the performance of pyrite as an absorber material in photovoltaic devices has fallen far short of the theoretical efficiency. A potential cause of this may be the instability of the pyrite phase. An alternate class of iron chalcogenides, Fe2MS4 (M = Ge, Si) has been proposed as a possible alternative to pyrite, yet has only been studied for interesting magnetic properties. Herein, we report the first solution synthesis of colloidal Fe2GeS4 and report the optical properties, reactivity, and potential for use as a photovoltaic material.},\n\tnumber = {49},\n\turldate = {2023-11-20},\n\tjournal = {J. Am. Chem. Soc.},\n\tauthor = {Fredrick, Sarah J. and Prieto, Amy L.},\n\tmonth = dec,\n\tyear = {2013},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {18256--18259},\n\tfile = {Fredrick_Prieto_2013_Solution Synthesis and Reactivity of Colloidal Fe2GeS4.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Solution Synthesis and Reactivity of Colloidal Fe2GeS4_2013\\\\Fredrick_Prieto_2013_Solution Synthesis and Reactivity of Colloidal Fe2GeS4.pdf:application/pdf},\n}\n\n
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\n Iron chalcogenides, in particular iron pyrite, have great potential to be useful materials for cost-effective thin film photovoltaics. However, the performance of pyrite as an absorber material in photovoltaic devices has fallen far short of the theoretical efficiency. A potential cause of this may be the instability of the pyrite phase. An alternate class of iron chalcogenides, Fe2MS4 (M = Ge, Si) has been proposed as a possible alternative to pyrite, yet has only been studied for interesting magnetic properties. Herein, we report the first solution synthesis of colloidal Fe2GeS4 and report the optical properties, reactivity, and potential for use as a photovoltaic material.\n
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\n  \n 2011\n \n \n (6)\n \n \n
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\n \n\n \n \n \n \n \n \n Compositionally Tunable Cu2ZnSn(S1–xSex)4 Nanocrystals: Probing the Effect of Se-Inclusion in Mixed Chalcogenide Thin Films.\n \n \n \n \n\n\n \n Riha, S. C.; Parkinson, B. A.; and Prieto, A. L.\n\n\n \n\n\n\n J. Am. Chem. Soc., 133(39): 15272–15275. October 2011.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"CompositionallyPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{riha_compositionally_2011,\n\ttitle = {Compositionally {Tunable} {Cu2ZnSn}({S1}–{xSex})4 {Nanocrystals}: {Probing} the {Effect} of {Se}-{Inclusion} in {Mixed} {Chalcogenide} {Thin} {Films}},\n\tvolume = {133},\n\tissn = {0002-7863},\n\tshorttitle = {Compositionally {Tunable} {Cu2ZnSn}({S1}–{xSex})4 {Nanocrystals}},\n\turl = {https://doi.org/10.1021/ja2058692},\n\tdoi = {10.1021/ja2058692},\n\tabstract = {Nanocrystals of multicomponent chalcogenides, such as Cu2ZnSnS4 (CZTS), are potential building blocks for low-cost thin-film photovoltaics (PVs). CZTS PV devices with modest efficiencies have been realized through postdeposition annealing at high temperatures in Se vapor. However, little is known about the precise role of Se in the CZTS system. We report the direct solution-phase synthesis and characterization of Cu2ZnSn(S1–xSex)4 nanocrystals (0 ≤ x ≤ 1) with the aim of probing the role of Se incorporation into CZTS. Our results indicate that increasing the amount of Se increases the lattice parameters, slightly decreases the band gap, and most importantly increases the electrical conductivity of the nanocrystals without a need for annealing.},\n\tnumber = {39},\n\turldate = {2023-11-20},\n\tjournal = {J. Am. Chem. Soc.},\n\tauthor = {Riha, Shannon C. and Parkinson, B. A. and Prieto, Amy L.},\n\tmonth = oct,\n\tyear = {2011},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {15272--15275},\n\tfile = {Riha et al_2011_Compositionally Tunable Cu2ZnSn(S1–xSex)4 Nanocrystals.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Compositionally Tunable Cu2ZnSn(S1–xSex)4 Nanocrystals_2011\\\\Riha et al_2011_Compositionally Tunable Cu2ZnSn(S1–xSex)4 Nanocrystals.pdf:application/pdf},\n}\n\n
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\n Nanocrystals of multicomponent chalcogenides, such as Cu2ZnSnS4 (CZTS), are potential building blocks for low-cost thin-film photovoltaics (PVs). CZTS PV devices with modest efficiencies have been realized through postdeposition annealing at high temperatures in Se vapor. However, little is known about the precise role of Se in the CZTS system. We report the direct solution-phase synthesis and characterization of Cu2ZnSn(S1–xSex)4 nanocrystals (0 ≤ x ≤ 1) with the aim of probing the role of Se incorporation into CZTS. Our results indicate that increasing the amount of Se increases the lattice parameters, slightly decreases the band gap, and most importantly increases the electrical conductivity of the nanocrystals without a need for annealing.\n
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\n \n\n \n \n \n \n \n \n Use of strontium titanate (SrTiO3) as an anode material for lithium-ion batteries.\n \n \n \n \n\n\n \n Johnson, D. C.; and Prieto, A. L.\n\n\n \n\n\n\n Journal of Power Sources, 196(18): 7736–7741. September 2011.\n \n\n\n\n
\n\n\n\n \n \n \"UsePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{johnson_use_2011,\n\ttitle = {Use of strontium titanate ({SrTiO3}) as an anode material for lithium-ion batteries},\n\tvolume = {196},\n\tissn = {0378-7753},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0378775311006677},\n\tdoi = {10.1016/j.jpowsour.2011.03.052},\n\tabstract = {Strontium titanate nanoparticles have been synthesized using a combination of sol-precipitation and hydrothermal techniques for subsequent testing as an anode material for lithium-ion batteries. The potentials associated with lithiation are 0.105V and 0.070V vs. Li/Li+ and 0.095V and 0.142V vs. Li/Li+ during de-lithiation. These potentials are significantly lower than the 1.0V to 1.5V vs. Li/Li+ typically reported in the literature for titanates. In an attempt to improve the lithiation and de-lithiation kinetics, as well as capacity retention, SrTiO3 nanoparticles were platinized using a photoinduced reduction of chloroplatinic acid. No significant changes in the morphology or crystal structure of the platinized nanoparticles were observed as a result of the reduction reaction. The voltage profile, charge and discharge kinetics, and cyclability of the platinized SrTiO3 nanoparticles are compared to that of the non-platinized SrTiO3 nanoparticles.},\n\tnumber = {18},\n\turldate = {2023-11-20},\n\tjournal = {Journal of Power Sources},\n\tauthor = {Johnson, Derek C. and Prieto, Amy L.},\n\tmonth = sep,\n\tyear = {2011},\n\tkeywords = {Anode nanoparticles, Lithium-ion battery, Photoinduced reduction, Strontium titanate},\n\tpages = {7736--7741},\n\tfile = {Johnson_Prieto_2011_Use of strontium titanate (SrTiO3) as an anode material for lithium-ion.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Use of strontium titanate (SrTiO3) as an anode material for lithium-ion_2011\\\\Johnson_Prieto_2011_Use of strontium titanate (SrTiO3) as an anode material for lithium-ion2.pdf:application/pdf},\n}\n\n
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\n Strontium titanate nanoparticles have been synthesized using a combination of sol-precipitation and hydrothermal techniques for subsequent testing as an anode material for lithium-ion batteries. The potentials associated with lithiation are 0.105V and 0.070V vs. Li/Li+ and 0.095V and 0.142V vs. Li/Li+ during de-lithiation. These potentials are significantly lower than the 1.0V to 1.5V vs. Li/Li+ typically reported in the literature for titanates. In an attempt to improve the lithiation and de-lithiation kinetics, as well as capacity retention, SrTiO3 nanoparticles were platinized using a photoinduced reduction of chloroplatinic acid. No significant changes in the morphology or crystal structure of the platinized nanoparticles were observed as a result of the reduction reaction. The voltage profile, charge and discharge kinetics, and cyclability of the platinized SrTiO3 nanoparticles are compared to that of the non-platinized SrTiO3 nanoparticles.\n
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\n \n\n \n \n \n \n \n \n Size-Dependent Hydrogen Storage Properties of Mg Nanocrystals Prepared from Solution.\n \n \n \n \n\n\n \n Norberg, N. S.; Arthur, T. S.; Fredrick, S. J.; and Prieto, A. L.\n\n\n \n\n\n\n J. Am. Chem. Soc., 133(28): 10679–10681. July 2011.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"Size-DependentPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{norberg_size-dependent_2011,\n\ttitle = {Size-{Dependent} {Hydrogen} {Storage} {Properties} of {Mg} {Nanocrystals} {Prepared} from {Solution}},\n\tvolume = {133},\n\tissn = {0002-7863},\n\turl = {https://doi.org/10.1021/ja201791y},\n\tdoi = {10.1021/ja201791y},\n\tabstract = {Mg nanocrystals of controllable sizes were prepared in gram quantities by chemical reduction of magnesocene using a reducing solution of potassium with an aromatic hydrocarbon (either biphenyl, phenanthrene, or naphthalene). The hydrogen sorption kinetics were shown to be dramatically faster for nanocrystals with smaller diameters, although the activation energies calculated for hydrogen absorption (115−122 kJ/mol) and desorption (126−160 kJ/mol) were within previously measured values for bulk Mg. This large rate enhancement cannot be explained by the decrease in particle size alone but is likely due to an increase in the defect density present in smaller nanocrystals.},\n\tnumber = {28},\n\turldate = {2023-11-20},\n\tjournal = {J. Am. Chem. Soc.},\n\tauthor = {Norberg, Nick S. and Arthur, Timothy S. and Fredrick, Sarah J. and Prieto, Amy L.},\n\tmonth = jul,\n\tyear = {2011},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {10679--10681},\n\tfile = {Norberg et al_2011_Size-Dependent Hydrogen Storage Properties of Mg Nanocrystals Prepared from.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Size-Dependent Hydrogen Storage Properties of Mg Nanocrystals Prepared from_2011\\\\Norberg et al_2011_Size-Dependent Hydrogen Storage Properties of Mg Nanocrystals Prepared from2.pdf:application/pdf},\n}\n\n
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\n Mg nanocrystals of controllable sizes were prepared in gram quantities by chemical reduction of magnesocene using a reducing solution of potassium with an aromatic hydrocarbon (either biphenyl, phenanthrene, or naphthalene). The hydrogen sorption kinetics were shown to be dramatically faster for nanocrystals with smaller diameters, although the activation energies calculated for hydrogen absorption (115−122 kJ/mol) and desorption (126−160 kJ/mol) were within previously measured values for bulk Mg. This large rate enhancement cannot be explained by the decrease in particle size alone but is likely due to an increase in the defect density present in smaller nanocrystals.\n
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\n \n\n \n \n \n \n \n \n Three-dimensional electrodes and battery architectures.\n \n \n \n \n\n\n \n Arthur, T. S.; Bates, D. J.; Cirigliano, N.; Johnson, D. C.; Malati, P.; Mosby, J. M.; Perre, E.; Rawls, M. T.; Prieto, A. L.; and Dunn, B.\n\n\n \n\n\n\n MRS Bulletin, 36(7): 523–531. July 2011.\n Publisher: Cambridge University Press\n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{arthur_three-dimensional_2011,\n\ttitle = {Three-dimensional electrodes and battery architectures},\n\tvolume = {36},\n\tissn = {1938-1425, 0883-7694},\n\turl = {https://www.cambridge.org/core/journals/mrs-bulletin/article/abs/threedimensional-electrodes-and-battery-architectures/A21C5AF6FD840BDB8808E12F84E856DC},\n\tdoi = {10.1557/mrs.2011.156},\n\tabstract = {Three-dimensional (3D) battery architectures have emerged as a new direction for powering microelectromechanical systems and other small autonomous devices. Although there are few examples to date of fully functioning 3D batteries, these power sources have the potential to achieve high power density and high energy density in a small footprint. This overview highlights the various architectures proposed for 3D batteries, the advances made in the fabrication of components designed for these devices, and the remaining technical challenges. Efforts directed at establishing design rules for 3D architectures and modeling are providing insight concerning the energy density and current uniformity achievable with these architectures. The significant progress made on the fabrication of electrodes and electrolytes designed for 3D batteries is an indication that a number of these battery architectures will be successfully demonstrated within the next few years.},\n\tlanguage = {en},\n\tnumber = {7},\n\turldate = {2023-11-20},\n\tjournal = {MRS Bulletin},\n\tauthor = {Arthur, Timothy S. and Bates, Daniel J. and Cirigliano, Nicolas and Johnson, Derek C. and Malati, Peter and Mosby, James M. and Perre, Emilie and Rawls, Matthew T. and Prieto, Amy L. and Dunn, Bruce},\n\tmonth = jul,\n\tyear = {2011},\n\tnote = {Publisher: Cambridge University Press},\n\tkeywords = {Energy generation, energy storage, intercalation, oxide, thin film},\n\tpages = {523--531},\n}\n\n
\n
\n\n\n
\n Three-dimensional (3D) battery architectures have emerged as a new direction for powering microelectromechanical systems and other small autonomous devices. Although there are few examples to date of fully functioning 3D batteries, these power sources have the potential to achieve high power density and high energy density in a small footprint. This overview highlights the various architectures proposed for 3D batteries, the advances made in the fabrication of components designed for these devices, and the remaining technical challenges. Efforts directed at establishing design rules for 3D architectures and modeling are providing insight concerning the energy density and current uniformity achievable with these architectures. The significant progress made on the fabrication of electrodes and electrolytes designed for 3D batteries is an indication that a number of these battery architectures will be successfully demonstrated within the next few years.\n
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\n \n\n \n \n \n \n \n \n Cu2Se Nanoparticles with Tunable Electronic Properties Due to a Controlled Solid-State Phase Transition Driven by Copper Oxidation and Cationic Conduction.\n \n \n \n \n\n\n \n Riha, S. C.; Johnson, D. C.; and Prieto, A. L.\n\n\n \n\n\n\n J. Am. Chem. Soc., 133(5): 1383–1390. February 2011.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"Cu2SePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{riha_cu2se_2011,\n\ttitle = {{Cu2Se} {Nanoparticles} with {Tunable} {Electronic} {Properties} {Due} to a {Controlled} {Solid}-{State} {Phase} {Transition} {Driven} by {Copper} {Oxidation} and {Cationic} {Conduction}},\n\tvolume = {133},\n\tissn = {0002-7863},\n\turl = {https://doi.org/10.1021/ja106254h},\n\tdoi = {10.1021/ja106254h},\n\tabstract = {Stoichiometric copper(I) selenide nanoparticles have been synthesized using the hot injection method. The effects of air exposure on the surface composition, crystal structure, and electronic properties were monitored using X-ray photoelectron spectroscopy, X-ray diffraction, and conductivity measurements. The current−voltage response changes from semiconducting to ohmic, and within a week a 3000-fold increase in conductivity is observed under ambient conditions. The enhanced electronic properties can be explained by the oxidation of Cu+ and Se2− on the nanoparticle surface, ultimately leading to a solid-state conversion of the core from monoclinic Cu2Se to cubic Cu1.8Se. This behavior is a result of the facile solid-state ionic conductivity of cationic Cu within the crystal and the high susceptibility of the nanoparticle surface to oxidation. This regulated transformation is appealing as one could envision using layers of Cu2Se nanoparticles as both semiconducting and conducting domains in optoelectronic devices simply by tuning the electronic properties for each layer through controlled oxidation.},\n\tnumber = {5},\n\turldate = {2023-11-20},\n\tjournal = {J. Am. Chem. Soc.},\n\tauthor = {Riha, Shannon C. and Johnson, Derek C. and Prieto, Amy L.},\n\tmonth = feb,\n\tyear = {2011},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {1383--1390},\n\tfile = {Riha et al_2011_Cu2Se Nanoparticles with Tunable Electronic Properties Due to a Controlled.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Cu2Se Nanoparticles with Tunable Electronic Properties Due to a Controlled_2011\\\\Riha et al_2011_Cu2Se Nanoparticles with Tunable Electronic Properties Due to a Controlled.pdf:application/pdf},\n}\n\n
\n
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\n Stoichiometric copper(I) selenide nanoparticles have been synthesized using the hot injection method. The effects of air exposure on the surface composition, crystal structure, and electronic properties were monitored using X-ray photoelectron spectroscopy, X-ray diffraction, and conductivity measurements. The current−voltage response changes from semiconducting to ohmic, and within a week a 3000-fold increase in conductivity is observed under ambient conditions. The enhanced electronic properties can be explained by the oxidation of Cu+ and Se2− on the nanoparticle surface, ultimately leading to a solid-state conversion of the core from monoclinic Cu2Se to cubic Cu1.8Se. This behavior is a result of the facile solid-state ionic conductivity of cationic Cu within the crystal and the high susceptibility of the nanoparticle surface to oxidation. This regulated transformation is appealing as one could envision using layers of Cu2Se nanoparticles as both semiconducting and conducting domains in optoelectronic devices simply by tuning the electronic properties for each layer through controlled oxidation.\n
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\n \n\n \n \n \n \n \n \n Photoelectrochemical Characterization of Nanocrystalline Thin-Film Cu2ZnSnS4 Photocathodes.\n \n \n \n \n\n\n \n Riha, S. C.; Fredrick, S. J.; Sambur, J. B.; Liu, Y.; Prieto, A. L.; and Parkinson, B. A.\n\n\n \n\n\n\n ACS Appl. Mater. Interfaces, 3(1): 58–66. January 2011.\n Publisher: American Chemical Society\n\n\n\n
\n\n\n\n \n \n \"PhotoelectrochemicalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{riha_photoelectrochemical_2011,\n\ttitle = {Photoelectrochemical {Characterization} of {Nanocrystalline} {Thin}-{Film} {Cu2ZnSnS4} {Photocathodes}},\n\tvolume = {3},\n\tissn = {1944-8244},\n\turl = {https://doi.org/10.1021/am1008584},\n\tdoi = {10.1021/am1008584},\n\tabstract = {Cu2ZnSnS4 (CZTS) nanocrystals, synthesized by a hot injection solution method, have been fabricated into thin films by dip-casting onto fluorine doped tin oxide (FTO) substrates. The photoresponse of the CZTS nanocrystal films was evaluated using absorbance measurements along with photoelectrochemical methods in aqueous electrolytes. Photoelectrochemical characterization revealed a p-type photoresponse when the films were illuminated in an aqueous Eu3+ redox electrolyte. The effects of CZTS stoichiometry, film thickness, and low-temperature annealing on the photocurrents from front and back illumination suggest that the minority carrier diffusion and recombination at the back contact (via reaction of photogenerated holes with Eu2+ produced from photoreduction by minority carriers) are the main loss mechanisms in the cell. Low-temperature annealing resulted in significant increases in the photocurrents for films made from both Zn-rich and stoichiometric CZTS nanocrystals.},\n\tnumber = {1},\n\turldate = {2023-11-20},\n\tjournal = {ACS Appl. Mater. Interfaces},\n\tauthor = {Riha, Shannon C. and Fredrick, Sarah J. and Sambur, Justin B. and Liu, Yuejiao and Prieto, Amy L. and Parkinson, B. A.},\n\tmonth = jan,\n\tyear = {2011},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {58--66},\n\tfile = {Riha et al_2011_Photoelectrochemical Characterization of Nanocrystalline Thin-Film Cu2ZnSnS4.pdf:C\\:\\\\Users\\\\abbyo\\\\OneDrive\\\\Documents\\\\Zotero\\\\Photoelectrochemical Characterization of Nanocrystalline Thin-Film Cu2ZnSnS4_2011\\\\Riha et al_2011_Photoelectrochemical Characterization of Nanocrystalline Thin-Film Cu2ZnSnS2.pdf:application/pdf},\n}\n
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\n Cu2ZnSnS4 (CZTS) nanocrystals, synthesized by a hot injection solution method, have been fabricated into thin films by dip-casting onto fluorine doped tin oxide (FTO) substrates. The photoresponse of the CZTS nanocrystal films was evaluated using absorbance measurements along with photoelectrochemical methods in aqueous electrolytes. Photoelectrochemical characterization revealed a p-type photoresponse when the films were illuminated in an aqueous Eu3+ redox electrolyte. The effects of CZTS stoichiometry, film thickness, and low-temperature annealing on the photocurrents from front and back illumination suggest that the minority carrier diffusion and recombination at the back contact (via reaction of photogenerated holes with Eu2+ produced from photoreduction by minority carriers) are the main loss mechanisms in the cell. Low-temperature annealing resulted in significant increases in the photocurrents for films made from both Zn-rich and stoichiometric CZTS nanocrystals.\n
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