Analysis of PEMFC freeze degradation at-20 degrees C after gas purging

	Analysis of PEMFC freeze degradation at-20 degrees C after gas purging
	Hou, Junbo ; Yu, Hongmei ; Zhang, Shengsheng ; Sun, Shucheng ; Wang, Hongwei ; Yi, Baolian ; Ming, Pingwen
刊名	journal of power sources
	2006-11-08
卷号	162 期号:1 页码:513-520
关键词	subzero storage degradation relative humidity proton exchange membrane fuel cell (PEMFC)
英文摘要	proton exchange membrane fuel cell (pemfc) freeze degradation was investigated using 20 freeze/thaw cycles of two cells with gases purged immediately after operation. the cell purged by gas with an rh 58.0% at 25 degrees c was found to have no performance loss after the 20 freeze/thaw cycles. from the cell resistances and the electrochemical impedance spectra (eis), the electrolyte conductivity and interfacial charge transfer resistance were unchanged. the electrochemical active surface area (ecsa) from the cyclic voltammetry (cv) measurements indicated that the amount of water in the catalyst layer of the cell was reduced to an extent that the damage in the freeze/thaw cycles was avoided. another cell was purged by rh 64.9% gas in the first cycle, and then was purged with rh 45.0% gas in 19 freeze/thaw cycles. although the cell easily became flooded at high current densities after the first cycle; no further performance loss was found. the pore size distribution data from mercury intrusion porosimetry measurements suggested that the gas diffusion layer was changed by the first freeze cycles. the micrographs (sem) further proved no membrane electrode assembly (mea) delamination. these results shed some light on the relationship of the water amount in the cell to subzero temperature exposure. (c) 2006 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]	electrolyte fuel-cell ; platinum loading electrodes ; repetitively brought ; water ; performance ; impedance ; transport ; membranes ; behavior ; size
收录类别	SCI
语种	英语
WOS记录号	WOS:000242059700062
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/140000]
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.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell R&D Ctr, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Beijing Jiaotong Univ, Sch Sci, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Hou, Junbo,Yu, Hongmei,Zhang, Shengsheng,et al. Analysis of PEMFC freeze degradation at-20 degrees C after gas purging[J]. journal of power sources,2006,162(1):513-520.
APA	Hou, Junbo.,Yu, Hongmei.,Zhang, Shengsheng.,Sun, Shucheng.,Wang, Hongwei.,...&Ming, Pingwen.(2006).Analysis of PEMFC freeze degradation at-20 degrees C after gas purging.journal of power sources,162(1),513-520.
MLA	Hou, Junbo,et al."Analysis of PEMFC freeze degradation at-20 degrees C after gas purging".journal of power sources 162.1(2006):513-520.