Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)

	Analysis of membrane electrode assembly (MEA) by environmental scanning electron microscope (ESEM)
	Yu, HM ; Schumacher, JO ; Zobel, M ; Hebling, C
刊名	journal of power sources
	2005-08-18
卷号	145 期号:2 页码:216-222
关键词	PEM fuel cell membrane electrode assembly environmental scanning electron microscope microstructure degradation
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.
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
收录类别	ISTP ; SCI
语种	英语
WOS记录号	WOS:000231893300015
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/139704]
专题	大连化学物理研究所_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
推荐引用方式 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.