Investigations on degradation of the long-term proton exchange membrane water electrolysis stack

	Investigations on degradation of the long-term proton exchange membrane water electrolysis stack
	Sun, Shucheng 1,2; Shao, Zhigang 1; Yu, Hongmei 1; Li, Guangfu 1; Yi, Baolian 1
刊名	journal of power sources
	2014-12-01
卷号	267 页码:515-520
关键词	Proton exchange membrane Water electrolysis stack Degradation Cation contamination
通讯作者	邵志刚
产权排序	待补充
合作状况	英
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.
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]	solid polymer electrolyte ; fuel-cells ; hydrogen-production ; oxygen evolution ; sodium-ion ; impedance ; electrocatalysis ; contamination ; performance ; catalyst
收录类别	SCI
资助信息	1，1
原文出处	520
语种	英语
WOS记录号	WOS:000339601800059
公开日期	2014-09-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/119698]
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, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	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.
APA	Sun, Shucheng,Shao, Zhigang,Yu, Hongmei,Li, Guangfu,&Yi, Baolian.(2014).Investigations on degradation of the long-term proton exchange membrane water electrolysis stack.journal of power sources,267,515-520.
MLA	Sun, Shucheng,et al."Investigations on degradation of the long-term proton exchange membrane water electrolysis stack".journal of power sources 267(2014):515-520.