Reversible and irreversible loss in performance in direct methanol fuel cells during freeze/thaw cycles

	Reversible and irreversible loss in performance in direct methanol fuel cells during freeze/thaw cycles
	Yang, Linlin 1,2; Sun, Hai 1; Wang, Suli 1; Jiang, Luhua 1; Sun, Gongquan 1
刊名	journal of power sources
	2012-12-01
卷号	219 页码:193-198
关键词	Direct methanol fuel cell Freeze/thaw cycling Reversible/irreversible performance loss Reverse current
英文摘要	in this paper, the reversible and the irreversible loss in performance of direct methanol fuel cell (dmfc) single cells induced by freeze/thaw cycling are determined and discussed. the reversible loss in performance is attributed to the decreased activity of electrocatalysts due to the strong adsorption of the intermediates from methanol electro-oxidation at subzero temperatures, while the irreversible loss in performance is due to the damage of membrane electrode assembly (mea) structure. it is found that the reversible degradation of performance is dominant when the cell operated at low current densities with o-2; the irreversible degradation is more obvious when the cell discharged at high current densities or operated with air. a method, applying a reverse current on the single cell, is put forward to recover the reversible loss in performance. by this method, the voltage of the single cell operated with o-2 at 100 ma cm(-2) drops only about 16 mv after experiencing 100 freeze/thaw cycles between-10 and 60 degrees c. crown copyright (c) 2012 published by elsevier b.v. all rights reserved.
类目[WOS]	electrochemistry ; energy & fuels
研究领域[WOS]	electrochemistry ; energy & fuels
关键词[WOS]	membrane-electrode assemblies ; cold-start ; catalyst layer ; ice formation ; water ; -20-degrees-c ; operation ; impedance ; behavior ; systems
收录类别	SCI
语种	英语
WOS记录号	WOS:000309568400028
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/142870]
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, Dalian Natl Lab Clean Energy, Div Fuel Cell & Battery, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Yang, Linlin,Sun, Hai,Wang, Suli,et al. Reversible and irreversible loss in performance in direct methanol fuel cells during freeze/thaw cycles[J]. journal of power sources,2012,219:193-198.
APA	Yang, Linlin,Sun, Hai,Wang, Suli,Jiang, Luhua,&Sun, Gongquan.(2012).Reversible and irreversible loss in performance in direct methanol fuel cells during freeze/thaw cycles.journal of power sources,219,193-198.
MLA	Yang, Linlin,et al."Reversible and irreversible loss in performance in direct methanol fuel cells during freeze/thaw cycles".journal of power sources 219(2012):193-198.