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学科主题: 物理化学
题名: Fine microstructure of high performance electrode in alkaline anion exchange membrane fuel cells
作者: Yang, Donglei1, 2, 3;  Yu, Hongmei1, 2;  Li, Guangfu1, 2;  Zhao, Yun1, 2;  Liu, Yanxi1, 2;  Zhang, Changkun1, 2, 3;  Song, Wei1, 2;  Shao, Zhigang1, 2
通讯作者: 俞红梅
关键词: Alkaline anion exchange membrane fuel cell ;  Dispersion solvent ;  Electrode microstructure ;  Ionomer content ;  Three phase boundary
刊名: JOURNAL OF POWER SOURCES
发表日期: 2014-12-01
DOI: 10.1016/j.jpowsour.2014.04.053
卷: 267, 页:39-47
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: The electrode fabrication and resulting microstructure are the main determinates of the performance of alkaline anion exchange membrane fuel cells (AAEMFCs). In the present work, the electrode microstructure is adjusted by the ionomer content in catalyst layers as well as the dispersion solvent for catalyst inks. The ionomer content shows a strong influence on the cell active, ohmic and mass-diffusion polarization losses. Especially, an in-suit proof for the ionomer as the hydroxide conductor is first given by the cell cycle voltammogram, and the optimum content is 20 wt.%. Meanwhile, it is found that the ionomer either dissolves in the dielectric constant epsilon = 183-24.3 solutions (including ethanol, propanol and isopropanol) or disperses in the n-butyl acetate (epsilon = 5.01) colloid. Compared with these electrodes using the solution method, the colloidal electrode tends to form the larger catalyst/ionomer agglomerates, increased pore volume and pore diameter, continuous ionomer networks for hydroxide conduction, and correspondingly decreased ohmic and mass-diffusion polarization losses. Ultimately, when employing the optimum ionomer content and the colloid approach, the highest peak power density we achieved in AAEMFC is 407 mW cm(-2) at 50 degrees C, which can be taken as a considerable success in comparison to the current results in publications. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: POLYMER ELECTROLYTE ;  OXYGEN ELECTROREDUCTION ;  DISPERSION SOLVENT ;  EMPIRICAL-EQUATION ;  CATALYST LAYER ;  IONOMER ;  NAFION ;  ASSEMBLIES ;  OPTIMIZATION ;  HYDROXIDE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000339601800007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119717
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.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Yang, Donglei,Yu, Hongmei,Li, Guangfu,et al. Fine microstructure of high performance electrode in alkaline anion exchange membrane fuel cells[J]. JOURNAL OF POWER SOURCES,2014,267:39-47.
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