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Performance characteristics and internal phenomena of polymer electrolyte membrane fuel cell with porous flow field

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Title: Performance characteristics and internal phenomena of polymer electrolyte membrane fuel cell with porous flow field
Authors: Tabe, Yutaka Browse this author →KAKEN DB
Nasu, Takuya Browse this author
Morioka, Satoshi Browse this author
Chikahisa, Takemi Browse this author →KAKEN DB
Keywords: PEM fuel cell
Porous flow field
Gas flow channel
Water management
Direct observation
Temperature distribution
Issue Date: 15-Sep-2013
Publisher: Elsevier Science Bv
Journal Title: Journal Of Power Sources
Volume: 238
Start Page: 21
End Page: 28
Publisher DOI: 10.1016/j.jpowsour.2013.03.047
Abstract: Polymer electrolyte membrane fuel cells (PEFCs) with a porous flow field have been proposed as an alternative to cells with gas flow channels. In this study, the basic characteristics of a PEFC with a porous flow field are identified experimentally. It is shown that stable operation is maintained under conditions at high current density and low stoichiometric ratios of the cathode air, but that operation with low relative humidity gases is difficult in the porous type cell. To clarify the detailed causes of these characteristics, internal phenomena are investigated using a cell specially made for cross-section observations of the cathode porous flow field and temperature distribution measurements on the anode gas diffusion layer (GDL) surface. The direct observations show that the porous type cell is superior in draining the condensed water from the GDL surface, and that hydrophilic properties of the porous material are important for better cell performance at high current densities. The temperature measurements indicate that increases in temperature near the reaction area tend to be larger in the porous type cell than in the channel type cell due to the lower heat removal capability of the porous material, resulting in the unstable operation at relatively low humidities. (C) 2013 Elsevier B.V. All rights reserved.
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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