Actions for Modeling Low-Platinum-Loading Effects in Fuel-Cell Catalyst Layers [electronic resource].

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Modeling Low-Platinum-Loading Effects in Fuel-Cell Catalyst Layers [electronic resource].

Published
Berkeley, Calif. : Lawrence Berkeley National Laboratory. Environmental Energy Technologies Division, 2011.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
56 : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, Lawrence Berkeley National Laboratory. Environmental Energy Technologies Division, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The cathode catalyst layer within a proton-exchange-membrane fuel cell is the most complex and critical, yet least understood, layer within the cell. The exact method and equations for modeling this layer are still being revised and will be discussed in this paper, including a 0.8 reaction order, existence of Pt oxides, possible non-isopotential agglomerates, and the impact of a film resistance towards oxygen transport. While the former assumptions are relatively straightforward to understand and implement, the latter film resistance is shown to be critically important in explaining increased mass-transport limitations with low Pt-loading catalyst layers. Model results demonstrate agreement with experimental data that the increased oxygen flux and/or diffusion pathway through the film can substantially decrease performance. Also, some scale-up concepts from the agglomerate scale to the more macroscopic porous-electrode scale are discussed and the resulting optimization scenarios investigated.
Report Numbers
E 1.99:lbnl-5395e
lbnl-5395e
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Note
Published through SciTech Connect.
01/20/2011.
"lbnl-5395e"
Journal of the Electrochemical Society 158 FT
Weber, Adam Z.; Yoon, Wonseok.
Funding Information
DE-AC02-05CH11231
View MARC record | catkey: 14065881