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题名: Hydrophilicity and hydrophobicity study of catalyst layers in proton exchange membrane fuel cells
作者: Yu, HM;  Ziegler, C;  Oszcipok, M;  Zobel, M;  Hebling, C
通讯作者: 俞红梅
关键词: hydrophobicity ;  hydrophilicity ;  contact angle ;  microstructure ;  membrane electrode assembly
刊名: ELECTROCHIMICA ACTA
发表日期: 2006-01-05
DOI: 10.1016/j.electacta.2005.06.036
卷: 51, 期:7, 页:1199-1207
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 301
产权排名: 2;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: The catalyst layer is one of the key components of PEMFCs. As the electrochemical reaction occurs at the three-phase interface of the catalyst layer, it is necessary to investigate the hydrophobicity and/or hydrophilicity properties of catalyst layers, which have a large impact on the water transport and even on the performance of the PEMFC. In this paper, time dependent contact angle measurements and porosity analyses have been performed to characterize the catalyst-coated membranes. For the first time, environmental scanning electron microscopy (ESEM) has been used to measure the hydrophilicity and hydrophobicity in the catalyst layer microstructure. The micro-contact angle distribution is given based on the microstructure. It shows a micro-scale hydrophobicity and hydrophilicity study, especially for an inhomogenous material. By means of conventional time-dependent contact angle measurements, porosity measurements and micro-contact angle measurements by ESEM, the hydrophobicity and hydrophilicity of catalyst-coated membranes have been investigated. Useful information has been gained to assist the understanding of catalyst layers from catalyst-coated membranes. (C) 2005 Elsevier Ltd. All rights reserved.
关键词[WOS]: CONTACT-ANGLE ;  WATER ;  SURFACE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000234818100008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98133
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Fraunhofer Inst Solar Energy Syst, D-79110 Freiburg, Germany
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Yu, HM,Ziegler, C,Oszcipok, M,et al. Hydrophilicity and hydrophobicity study of catalyst layers in proton exchange membrane fuel cells[J]. ELECTROCHIMICA ACTA,2006,51(7):1199-1207.
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