Capturing metastable structures during high-rate cycling of LiFePO₄ nanoparticle electrodes. Liu, H., Strobridge, F. C, Borkiewicz, O. J, Wiaderek, K. M, Chapman, K. W, Chupas, P. J, & Grey, C. P Science (New York, N.Y.), 344:1252817, June, 2014. ![Capturing metastable structures during high-rate cycling of LiFePO₄ nanoparticle electrodes. [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 1 download The absence of a phase transformation involving substantial structural rearrangements and large volume changes is generally considered to be a key characteristic underpinning the high-rate capability of any battery electrode material. In apparent contradiction, nanoparticulate LiFePO4, a commercially important cathode material, displays exceptionally high rates, whereas its lithium-composition phase diagram indicates that it should react via a kinetically limited, two-phase nucleation and growth process. Knowledge concerning the equilibrium phases is therefore insufficient, and direct investigation of the dynamic process is required. Using time-resolved in situ x-ray powder diffraction, we reveal the existence of a continuous metastable solid solution phase during rapid lithium extraction and insertion. This nonequilibrium facile phase transformation route provides a mechanism for realizing high-rate capability of electrode materials that operate via two-phase reactions.
@article{liu_capturing_2014,
title = {Capturing metastable structures during high-rate cycling of {LiFePO}₄ nanoparticle electrodes.},
volume = {344},
copyright = {All rights reserved},
issn = {1095-9203},
url = {http://www.ncbi.nlm.nih.gov/pubmed/24970091},
doi = {10.1126/science.1252817},
abstract = {The absence of a phase transformation involving substantial structural rearrangements and large volume changes is generally considered to be a key characteristic underpinning the high-rate capability of any battery electrode material. In apparent contradiction, nanoparticulate LiFePO4, a commercially important cathode material, displays exceptionally high rates, whereas its lithium-composition phase diagram indicates that it should react via a kinetically limited, two-phase nucleation and growth process. Knowledge concerning the equilibrium phases is therefore insufficient, and direct investigation of the dynamic process is required. Using time-resolved in situ x-ray powder diffraction, we reveal the existence of a continuous metastable solid solution phase during rapid lithium extraction and insertion. This nonequilibrium facile phase transformation route provides a mechanism for realizing high-rate capability of electrode materials that operate via two-phase reactions.},
urldate = {2014-07-10},
journal = {Science (New York, N.Y.)},
author = {Liu, Hao and Strobridge, Fiona C and Borkiewicz, Olaf J and Wiaderek, Kamila M and Chapman, Karena W and Chupas, Peter J and Grey, Clare P},
month = jun,
year = {2014},
pmid = {24970091},
pages = {1252817},
}
Downloads: 1
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