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Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)
Yu, HM; Schumacher, JO; Zobel, M; Hebling, C
KeywordPem Fuel Cell Membrane Electrode Assembly Environmental Scanning Electron Microscope Microstructure Degradation
Source PublicationJOURNAL OF POWER SOURCES
2005-08-18
DOI10.1016/j.jpowsour.2004.12.069
Volume145Issue:2Pages:216-222
Indexed ByISTP ; SCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectElectrochemistry ; Energy & Fuels
WOS Research AreaElectrochemistry ; Energy & Fuels
WOS KeywordGAS-DIFFUSION LAYER ; FUEL-CELLS ; CATHODE ; WATER
AbstractTo 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.
Language英语
WOS IDWOS:000231893300015
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/139704
Collection中国科学院大连化学物理研究所
Affiliation1.Fraunhofer Inst Solar Energy Syst, D-79110 Freiburg, Germany
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
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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