(Plenary) Pore Network Modeling of the Full Membrane Electrode Assembly of a Polymer Electrolyte Membrane Fuel Cell. Aghighi, M. & Gostick, J. T. ECS Transactions, 64(3):19--25, August, 2014. 00000
(Plenary) Pore Network Modeling of the Full Membrane Electrode Assembly of a Polymer Electrolyte Membrane Fuel Cell [link]Paper  doi  abstract   bibtex   
Pore network modeling was applied to a full PEM membrane electrode assembly sandwich. This model included liquid water percolation and gas transport in the gas diffusion and catalyst layers, and ionic transport in the catalyst layers and membrane. The ability of pore network models to resolve discrete water clusters played a key role in the electrochemical simulations. It was found that local water blockages not only cause concentration polarization, but also that the protons generated in the anode must travel longer paths to reach an active site on the cathode not masked by a discrete water. Consequently, the iR polarization was actually increased in the presence of liquid water. This behavior is not typically observed in continuum models since they do not treat water treated as explicit blockages and hence do not see the increased transport lengths resulting from the localized production and consumption of protons.
@article{ aghighi_plenary_2014,
  title = {({Plenary}) {Pore} {Network} {Modeling} of the {Full} {Membrane} {Electrode} {Assembly} of a {Polymer} {Electrolyte} {Membrane} {Fuel} {Cell}},
  volume = {64},
  issn = {1938-6737, 1938-5862},
  url = {http://ecst.ecsdl.org/content/64/3/19},
  doi = {10.1149/06403.0019ecst},
  abstract = {Pore network modeling was applied to a full PEM membrane electrode assembly sandwich. This model included liquid water percolation and gas transport in the gas diffusion and catalyst layers, and ionic transport in the catalyst layers and membrane. The ability of pore network models to resolve discrete water clusters played a key role in the electrochemical simulations. It was found that local water blockages not only cause concentration polarization, but also that the protons generated in the anode must travel longer paths to reach an active site on the cathode not masked by a discrete water. Consequently, the iR polarization was actually increased in the presence of liquid water. This behavior is not typically observed in continuum models since they do not treat water treated as explicit blockages and hence do not see the increased transport lengths resulting from the localized production and consumption of protons.},
  language = {en},
  number = {3},
  urldate = {2014-10-28TZ},
  journal = {ECS Transactions},
  author = {Aghighi, Mahmoudreza and Gostick, Jeff T.},
  month = {August},
  year = {2014},
  note = {00000},
  pages = {19--25}
}

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