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学科主题: 物理化学
题名: Investigations on degradation of the long-term proton exchange membrane water electrolysis stack
作者: Sun, Shucheng1, 2;  Shao, Zhigang1;  Yu, Hongmei1;  Li, Guangfu1;  Yi, Baolian1
通讯作者: 邵志刚
关键词: Proton exchange membrane ;  Water electrolysis stack ;  Degradation ;  Cation contamination
刊名: JOURNAL OF POWER SOURCES
发表日期: 2014-12-01
DOI: 10.1016/j.jpowsour.2014.05.117
卷: 267, 页:515-520
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: DNL03
项目归属: DNL0301
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
资助者: 1,1
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: A 9-cell proton exchange membrane (PEM) water electrolysis stack is developed and tested for 7800 h. The average degradation rate of 35.5 mu V h(-1) per cell is measured. The 4th MEA of the stack is offline investigated and characterized. The electrochemical impedance spectroscopy (EIS) shows that the charge transfer resistance and ionic resistance of the cell both increase. The linear sweep scan (LSV) shows the hydrogen crossover rate of the membrane has slight increase. The electron probe X-ray microanalyze (EPMA) illustrates further that Ca, Cu and Fe elements distribute in the membrane and catalyst layers of the catalyst-coated membranes (CCMs). The cations occupy the ion exchange sites of the Nation polymer electrolyte in the catalyst layers and membrane, which results in the increase in the anode and the cathode overpotentials. The metallic impurities originate mainly from the feed water and the components of the electrolysis unit. Fortunately, the degradation was reversible and can be almost recovered to the initial performance by using 0.5 M H2SO4. This indicates the performance degradation of the stack running 7800 h is mainly caused by a recoverable contamination. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: SOLID POLYMER ELECTROLYTE ;  FUEL-CELLS ;  HYDROGEN-PRODUCTION ;  OXYGEN EVOLUTION ;  SODIUM-ION ;  IMPEDANCE ;  ELECTROCATALYSIS ;  CONTAMINATION ;  PERFORMANCE ;  CATALYST
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000339601800059
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119698
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, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Sun, Shucheng,Shao, Zhigang,Yu, Hongmei,et al. Investigations on degradation of the long-term proton exchange membrane water electrolysis stack[J]. JOURNAL OF POWER SOURCES,2014,267:515-520.
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