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

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Title: Effects of Cathode Catalyst Layer Structure and Properties Dominating Polymer Electrolyte Fuel Cell Performance
Authors: Tabe, Yutaka Browse this author →KAKEN DB
Nishino, Masayoshi Browse this author
Takamatsu, Hiroyuki Browse this author
Chikahisa, Takemi Browse this author →KAKEN DB
Keywords: catalysis
catalysts
cathodes
electrochemical electrodes
ionic conductivity
platinum
polymer electrolytes
porosity
proton exchange membrane fuel cells
solubility
Issue Date: 12-Aug-2011
Publisher: The Electrochemical Society
Journal Title: Journal of the Electrochemical Society
Volume: 158
Issue: 10
Start Page: B1246
End Page: B1254
Publisher DOI: 10.1149/1.3624606
Abstract: 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)
Type: article
URI: http://hdl.handle.net/2115/47104
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田部 豊

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