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

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Title: Effect of cathode separator structure on performance characteristics of free-breathing PEMFCs
Authors: Tabe, Yutaka Browse this author →KAKEN DB
Park, Sang-Kyun Browse this author
Kikuta, Kazushige Browse this author
Chikahisa, Takemi Browse this author →KAKEN DB
Hishinuma, Yukio Browse this author
Keywords: PEMFC
Open type
Channel type
Contact resistance
Issue Date: 8-Nov-2006
Publisher: Elsevier B.V.
Journal Title: Journal of Power Sources
Volume: 162
Issue: 1
Start Page: 58
End Page: 65
Publisher DOI: 10.1016/j.jpowsour.2006.06.093
Abstract: 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.
Type: article (author version)
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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