A discrete particle packing model for the formation of a catalyst layer in polymer electrolyte fuel cells

Magnus So, Kayoung Park, Tomohiro Ohnishi, Masumi Ono, Yoshifumi Tsuge, Gen Inoue

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)

抄録

We developed a reconstruction simulation model for a catalyst layer of a polymer electrolyte fuel cell to elucidate the effect of the size and shape of the catalyst agglomerates on the cell performance. The geometry of the catalyst layer was obtained by simulating the packing of carbon black agglomerates in ink modeled as multisphere objects by the discrete element method. Electrochemical reaction and mass transfer were modeled based on the resulting three-dimensional geometry of the catalyst. Both the size and shape of the agglomerate significantly influence the catalyst structure and performance. Branched agglomerates lead to higher porosity, larger pore sizes, and better cell performance. For each agglomerate shape, there is an optimum size at which the performance is the maximum, because of the optimum trade-off relationship between the oxygen diffusion and proton conduction. Understanding the mechanism of the catalyst formation can aid the design of catalysts to improve their performance.

本文言語英語
ページ(範囲)32170-32183
ページ数14
ジャーナルInternational Journal of Hydrogen Energy
44
60
DOI
出版ステータス出版済み - 12月 6 2019

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • 凝縮系物理学
  • エネルギー工学および電力技術

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