Behaviors of proton exchange membrane fuel cells under oxidant starvation

	Behaviors of proton exchange membrane fuel cells under oxidant starvation
	Dou, Meiling 1,2; Hou, Ming 1; Liang, Dong 1,2; Shen, Qiang 1,2; Zhang, Huabing 1,2; Lu, Wangting 1,2; Shao, Zhigang 1; Yi, Baolian 1
刊名	journal of power sources
	2011-03-01
卷号	196 期号:5 页码:2759-2762
关键词	Proton exchange membrane fuel cell (PEMFC) Oxidant starvation Current distribution Local interfacial potential
ISSN号	待补充
通讯作者	侯明 ; 邵志刚
产权排序	1,1
中文摘要	behaviors of proton exchange membrane fuel cells under oxidant starvation
英文摘要	durability is an important issue in proton exchange membrane fuel cells (pemfcs) currently. reactant starvation could be one of the reasons for pemfc degradation. in this research, the oxidant starvation phenomena in a single cell are investigated. the local interfacial potential, current and temperature distribution are detected in situ with a specially constructed segmented cell. experimental results show that during the cell reversal process due to oxidant starvation, the local interfacial potential in the oxidant inlet keeps positive while that of the middle and outlet regions become negative, which illustrates that oxygen and proton reduction reactions could occur simultaneously in different regions at the cathode. the current distribution would be more uneven with decreasing air stoichiometry before cell reversal. when cell reversal occurs, the current will redistribute and the current distribution tends more uniform. at the critical point of cell reversal, the most significant inhomogeneity in the current distribution can be observed. the temperature distribution in the cell is also monitored on-line. the local hot spot exists in the cell when cell reversal occurs. the study of the critical reversal air stoichiometry under different loads shows that the critical reversal air stoichiometry increases with the rising loads. (c) 2010 elsevier b.v. all rights reserved.
学科主题	物理化学
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]	performance ; reversal ; pemfc ; air
收录类别	SCI
语种	英语
WOS记录号	WOS:000286705100043
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115446]
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 Syst & Engn Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Dou, Meiling,Hou, Ming,Liang, Dong,et al. Behaviors of proton exchange membrane fuel cells under oxidant starvation[J]. journal of power sources,2011,196(5):2759-2762.
APA	Dou, Meiling.,Hou, Ming.,Liang, Dong.,Shen, Qiang.,Zhang, Huabing.,...&Yi, Baolian.(2011).Behaviors of proton exchange membrane fuel cells under oxidant starvation.journal of power sources,196(5),2759-2762.
MLA	Dou, Meiling,et al."Behaviors of proton exchange membrane fuel cells under oxidant starvation".journal of power sources 196.5(2011):2759-2762.