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Effect of cathode separator structure on performance characteristics of free-breathing PEMFCs

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タイトル: Effect of cathode separator structure on performance characteristics of free-breathing PEMFCs
著者: Tabe, Yutaka 著作を一覧する
Park, Sang-Kyun 著作を一覧する
Kikuta, Kazushige 著作を一覧する
Chikahisa, Takemi 著作を一覧する
Hishinuma, Yukio 著作を一覧する
キーワード: PEMFC
Open type
Channel type
Contact resistance
発行日: 2006年11月 8日
出版者: Elsevier B.V.
誌名: Journal of Power Sources
巻: 162
号: 1
開始ページ: 58
終了ページ: 65
出版社 DOI: 10.1016/j.jpowsour.2006.06.093
抄録: The performance of free-breathing polymer electrolyte membrane fuel cells (PEMFCs) was studied experimentally and the effect of the cathode separator structure on the cell performance was investigated. Two types of cathode separators were used for a cell with an 18 cm2 active area: an open type with parallel rectangular open-slits and a channel type with straight vertical channels with open ends. The polarization curves, cell impedance, and contact pressure distribution of the separators were measured with each type of cathode structure. The result showed that it is difficult to realize a uniform contact pressure across the cell layers for the open type separator, and this results in higher contact resistance and poorer cell performance than the channel type separator. The channel type separator can maintain a low contact resistance, and the cell performance is strongly affected by the natural convection inside the channel. Optimization of the channel design of the channel type separator achieves good performance and this type of separator is superior for a free-breathing PEMFC. A computational three-dimensional analysis for the free-breathing channel type PEMFC with the different channel depths was performed, and it identified the influence of natural convection.
資料タイプ: article (author version)
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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