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学科主题: 物理化学
题名: Behaviors of proton exchange membrane fuel cells under oxidant starvation
作者: Dou, Meiling1, 2;  Hou, Ming1;  Liang, Dong1, 2;  Shen, Qiang1, 2;  Zhang, Huabing1, 2;  Lu, Wangting1, 2;  Shao, Zhigang1;  Yi, Baolian1
通讯作者: 侯明 ;  邵志刚
关键词: Proton exchange membrane fuel cell (PEMFC) ;  Oxidant starvation ;  Current distribution ;  Local interfacial potential
刊名: JOURNAL OF POWER SOURCES
发表日期: 2011-03-01
DOI: 10.1016/j.jpowsour.2010.11.005
卷: 196, 期:5, 页:2759-2762
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 301
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
摘要: Behaviors of proton exchange membrane fuel cells under oxidant starvation
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
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.
关键词[WOS]: PERFORMANCE ;  REVERSAL ;  PEMFC ;  AIR
语种: 英语
WOS记录号: WOS:000286705100043
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115446
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
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.
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