Effect of the Composition and Coating Condition on the Structure and Performance of Catalyst Layer of PEFC
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概要
- 論文の詳細を見る
The structure of the catalyst layer of PEFCs has a considerable influence on the cell performance. The catalyst layer is manufactured by coating a suspension consisting of Pt/C catalyst particles and a Nafion solution. In a catalyst layer, the decrease in the Pt/C particle agglomeration controlled by the coating condition was reported to improve the performance; however, the influence that the coating condition exerts on the structure and then performance of the catalyst layer when the compositions of suspension are different has not yet been researched well. In this study, we researched a method to control the structure of a catalyst layer by the coating condition and suspension composition. The surface structure, which is well correlated with the predicted number of agglomerated Pt/C particles, showed good agreement with the performance. Under the condition where the Pt/C particles are not dispersed well, the performance was improved with an increase in the coating speed and Nafion content. However, that improvement became negligible at the optimum Nafion content providing maximal cell performance. Further, at a higher Nafion content, the excessive dispersion of Pt/C particles in the catalyst layer deteriorated the performance drastically. These results imply that the performance improvement by coating is effective when the suspension shows fairly high viscosity. Further, a little addition of solvent to decrease the viscosity also improves the performance; however it may be deteriorated by an excessive addition.
- 社団法人 化学工学会の論文
- 2007-10-01
著者
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Usui Hiromoto
Department of Chemical Science and Engineering, Kobe University
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小林 哲彦
(独)産業技術総合研究所 ユビキタスエネルギー研究部門
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Suzuki Hiroshi
Department of Engineering and Applied Science, Faculty of Science and Technology, Sophia University
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Kobayashi T
Special Division For Green Life Technology National Institute Of Advanced Industrial Science And Tec
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Kobayashi Tetsuhiko
Research Institute Of Ubiquitous Energy Devices National Institute Of Advanced Industrial Science An
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Kobayashi Tetsuhiko
Osaka National Research Institute Aist - Miti
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KOMODA Yoshiyuki
Department of Chemical Science and Engineering, Kobe University
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IKEDA Youichi
Department of Molecular Science and Material Engineering, Kobe University
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IOROI Tsutomu
Research Institute of Ubiquitous Energy Devices, National Institute of Advanced Industrial Science a
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薄井 洋基
神戸大学
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Usui Hiromoto
Dep. Of Chemical Sci. And Engineering Kobe Univ.
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Usui H
Yamaguchi Univ. Ube Jpn
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薄井 洋基
神戸大
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薄井 洋基
Dep. Of Chemical Sci. And Engineering Kobe Univ.
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Ioroi Tsutomu
Research Institute Of Ubiquitous Energy Devices National Institute Of Advanced Industrial Science An
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Ikeda Youichi
Department Of Electronics Kyoto University
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Ikeda Youichi
Department Of Molecular Science And Material Engineering Kobe University
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Suzuki Hiroshi
Department Of Allergy And Immunology National Research Institute For Child Health & Development
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Usui Hiromoto
Department Of Applied Chemistry And Chemical Engineering Yamaguchi University
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Komoda Yoshiyuki
Department Of Chemical Science And Engineering Kobe University
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Komoda Yoshiyuki
Department Of Chemical Science And Engineering Graduate School Of Engineering Science Osaka Universi
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Suzuki Hiroshi
Department Of Chemical Science And Engineering Kobe University
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小林 哲彦
(独)産業技術総合研究所
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Suzuki H
Department Of Chemical Science And Engineering Kobe University
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