The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance

	The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance
	Song, S ; Wang, G ; Zhou, W ; Zhao, X ; Sun, G ; Xin, Q ; Kontou, S ; Tsiakaras, P
刊名	journal of power sources
	2005-01-10
卷号	140 期号:1 页码:103-110
关键词	direct ethanol fuel cell ethanol crossover electrode delamination
英文摘要	in the present work, the changes of nafion((r))-115 membrane porosity in the presence of ethanol aqueous solutions of different concentrations were determined by weighing vacuum-dried and ethanol solution-equilibrated membranes. it was found that membrane porosity increases as ethanol concentration increases. membrane electrode assemblies (meas) have been prepared by following both the conventional and the decal transfer method. the ethanol crossover through these two meas was electrochemically quantified by a voltammetric method. a 10h stability test of direct ethanol fuel cell (defc) at a current density of 50 ma cm(-2) was carried out. it was found that the electrode preparation procedure has an obvious effect on ethanol crossover and direct ethanol fuel cell's performance and stability. the single defc test results showed that about 15 and 34% of the original peak power density was lost after 10h of life test for the meas prepared by the decal transfer method and the conventional method, respectively. electrochemical impedance spectrum (eis) results of the meas showed that, in the case of the membrane electrode assembly prepared by the following decal transfer method, the internal cell resistance was almost the same, 0.236 ohm cm(2) before the life test and 0.239 ohm cm(2) after 10h of life test, while the respective values for the membrane electrode assembly by the conventional method are 0.289 and 0.435 ohm cm(2). it is supposed that the improved cell performance with mea by the decal transfer method could be resorted to both a better contact between the catalyst layer and the electrolyte membrane and higher catalyst utilization. furthermore, based on the experimental results, the increased internal cell resistance and the degraded single defc performance could be attributed to the delamination of the catalyst layer from the electrolyte membrane. (c) 2004 elsevier b.v. all rights reserved.
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]	methanol fuel-cell ; anode catalysts ; exchange membranes ; mass-spectrometry ; ion-transport ; electrooxidation ; electrode ; oxidation ; temperature ; stack
收录类别	SCI
语种	英语
WOS记录号	WOS:000226265900013
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/139897]
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.Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Lab, CAS, Dalian 116023, Peoples R China 2.Dalian Inst Chem Phys, State Key Lab Catalysis, CAS, Dalian 116023, Peoples R China 3.Univ Thessalia, Sch Engn, Dept Mech & Ind Engn, Volos 38334, Greece
推荐引用方式 GB/T 7714	Song, S,Wang, G,Zhou, W,et al. The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance[J]. journal of power sources,2005,140(1):103-110.
APA	Song, S.,Wang, G.,Zhou, W.,Zhao, X.,Sun, G.,...&Tsiakaras, P.(2005).The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance.journal of power sources,140(1),103-110.
MLA	Song, S,et al."The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance".journal of power sources 140.1(2005):103-110.