中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance
作者: Song, S;  Wang, G;  Zhou, W;  Zhao, X;  Sun, G;  Xin, Q;  Kontou, S;  Tsiakaras, P
关键词: direct ethanol fuel cell ;  ethanol crossover ;  electrode delamination
刊名: JOURNAL OF POWER SOURCES
发表日期: 2005-01-10
DOI: 10.1016/j.jpowsour.2004.08.011
卷: 140, 期:1, 页:103-110
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
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.
关键词[WOS]: METHANOL FUEL-CELL ;  ANODE CATALYSTS ;  EXCHANGE MEMBRANES ;  MASS-SPECTROMETRY ;  ION-TRANSPORT ;  ELECTROOXIDATION ;  ELECTRODE ;  OXIDATION ;  TEMPERATURE ;  STACK
语种: 英语
WOS记录号: WOS:000226265900013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139897
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


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

Recommended Citation:
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.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Song, S]'s Articles
 [Wang, G]'s Articles
 [Zhou, W]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Song, S]‘s Articles
 [Wang, G]‘s Articles
 [Zhou, W]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace