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Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)
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
2005-08-18
DOI10.1016/j.jpowsour.2004.12.069
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
关键词[WOS]GAS-DIFFUSION LAYER ; FUEL-CELLS ; CATHODE ; WATER
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.
语种英语
WOS记录号WOS:000231893300015
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139704
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Yu, HM,Schumacher, JO,Zobel, M,&Hebling, C.(2005).Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM).JOURNAL OF POWER SOURCES,145(2),216-222.
MLA Yu, HM,et al."Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)".JOURNAL OF POWER SOURCES 145.2(2005):216-222.
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