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Effects of Cathode Catalyst Layer Structure and Properties Dominating Polymer Electrolyte Fuel Cell Performance

JES158-10_B1246-B1254.pdf1.44 MBPDF見る/開く

タイトル: Effects of Cathode Catalyst Layer Structure and Properties Dominating Polymer Electrolyte Fuel Cell Performance
著者: Tabe, Yutaka 著作を一覧する
Nishino, Masayoshi 著作を一覧する
Takamatsu, Hiroyuki 著作を一覧する
Chikahisa, Takemi 著作を一覧する
キーワード: catalysis
electrochemical electrodes
ionic conductivity
polymer electrolytes
proton exchange membrane fuel cells
発行日: 2011年 8月12日
出版者: The Electrochemical Society
誌名: Journal of the Electrochemical Society
巻: 158
号: 10
開始ページ: B1246
終了ページ: B1254
出版社 DOI: 10.1149/1.3624606
抄録: Transport of electrons, protons, and oxygen are necessary for the cathode reactions in polymer electrolyte membrane fuel cells, and achieving the optimum structure of the electrode catalyst layer and the efficient transport of reactants is an effective avenue to reduce the use of platinum catalyst. This study applied three-phase boundary and cathode catalyst layer models to understand details of optimally efficient structures for the transport of reaction components. The factors dominating the effects of the catalyst layer structure and the properties identified in this manner are investigated using the models. Additionally, equations of evaluation are developed to evaluate the effects of the structure and the properties on the cell performance, and the effectiveness of the developed equations is confirmed by a comparison of the results calculated by the equations with the model simulations. From these results, the structure of the porosity, the catalyst layer, and the polymer electrolyte thicknesses, that are optimum for the gas transport and proton conduction, are determined. It is found that the solubility of oxygen in the polymer is one of the dominant factors in the processes of the cathode catalyst layer, and that increasing the solubility is highly effective to reduce the need for platinum.
Rights: © The Electrochemical Society, Inc. 2011. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in J. Electrochem. Soc., 158(10), pp. B1246-B1254 (2011)
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 田部 豊


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