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题名: Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)
作者: Yu, HM;  Schumacher, JO;  Zobel, M;  Hebling, C
关键词: PEM fuel cell membrane electrode assembly ;  environmental scanning electron microscope ;  microstructure ;  degradation
刊名: JOURNAL OF POWER SOURCES
发表日期: 2005-08-18
DOI: 10.1016/j.jpowsour.2004.12.069
卷: 145, 期:2, 页:216-222
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: To date, the available equipment for characterising the microstructure of membrane electrode assembly (MEA) is still not well developed. For example, applying the normal scanning electron microscope (SEM) only provides information on the dry structure of MEAs. This paper presents a microstructure analysis method of MEAs in proton exchange membrane fuel cells (PEMFC). The microstructure analysis in this paper utilises the environmental scanning electron microscope (ESEM), which shows its advantage on the sample microstructure analysis in wet mode. When water is present, the characteristics of the MEA, especially the hydrophobic and/or hydrophilic properties, are distinguishable on the ESEM images. With proper temperature and pressure control, the water distribution within both the membrane and the catalyst layer can be viewed by ESEM. Based on ESEM measurement and mercury porosity measurement, the distributions of hydrophobic and hydrophilic pores in MEA have been analyzed. By means of ESEM and energy dispersive X-ray (EDX), a degraded MEA is characterized. The microstructure change of the degraded MEA has been discussed. The results provide helpful information for the understanding of MEAs in PEMFC. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: GAS-DIFFUSION LAYER ;  FUEL-CELLS ;  CATHODE ;  WATER
语种: 英语
WOS记录号: WOS:000231893300015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139704
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,Schumacher, JO,Zobel, M,et al. Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)[J]. JOURNAL OF POWER SOURCES,2005,145(2):216-222.
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