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Water Transport and PEFC Performance with Different Interface Structure between Micro-Porous Layer and Catalyst Layer

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Title: Water Transport and PEFC Performance with Different Interface Structure between Micro-Porous Layer and Catalyst Layer
Authors: Aoyama, Yusuke Browse this author
Suzuki, Kengo Browse this author
Tabe, Yutaka Browse this author →KAKEN DB
Chikahisa, Takemi Browse this author →KAKEN DB
Tanuma, Toshihiro Browse this author
Issue Date: 14-Apr-2016
Publisher: The Electrochemical Society (ECS)
Journal Title: Journal of the electrochemical society
Volume: 163
Issue: 5
Start Page: F359
End Page: F366
Publisher DOI: 10.1149/2.0451605jes
Abstract: For interfaces between micro-porous layers (MPL) and catalyst layers (CL) made by the gas diffusion electrode (GDE) method, a seamless interface without gaps, shows better performance than that of cells with an interface made by the decal transfer method. With the decal transfer method, the MPL is simply hot-pressed to the CL-membrane assembly. This study investigates the effect of interface structure on cell performance and water transport in the MPL. Water distribution in cross sections of multiple layers were observed by a freezing method, where the cell is cooled below freezing temperature in short time and the water was observed in ice form by Cryo-SEM. The results show that a membrane electrode assembly (MEA) using the GDE method improves cell performance at high current densities. Direct observations by the freezing method and cryo-SEM show that there is no water accumulation at the MPL/CL interface made by the GDE method, while water accumulates at the interface made by the decal method. Other observations show that the water amount inside the MPL increases similarly in the two types of MEA when lowering the temperature, and the difference between the two types of MEA was only the water amount in the interface.
Rights: © The Electrochemical Society, Inc. 2016. 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.,volume 163, issue 5, pp.F359-F366, 2016.
Type: article
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: 近久 武美

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