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题名: Effect of catalytic ink on sub-freezing endurance of PEMFCs
作者: Song, Wei1, 2;  Yu, Hongmei1;  Hao, Lixing1, 2;  Yi, Baolian1;  Shao, Zhigang1
通讯作者: 俞红梅
关键词: Proton exchange membrane fuel cells ;  Catalyst-coated membrane ;  Sub-freezing endurance ;  Catalytic ink
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2010-10-01
DOI: 10.1016/j.ijhydene.2010.07.041
卷: 35, 期:20, 页:11129-11137
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 301
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: Effect of catalytic ink on sub-freezing endurance of proton exchange membrane fuel cells (PEMFCs) was investigated in this paper. By direct spraying method, a catalyst-coated membrane (CCM) was fabricated with isopropyl alcohol as organic solvent (CCM-A), and CCM-B was fabricated with isopropyl alcohol and butyl acetate. The hydrophobicity of the two CCMs was similar proved by contact angle tests, and CCM-B showed larger pore volume demonstrated by mercury intrusion tests. Initial cell performance and relevant electrochemical characteristics of the two CCMs were measured and compared. CCM-B showed better performance and larger electrochemical active surface area (ECA). By analyzing the electrochemical impedance spectra (EIS) at low current densities, the ionic resistances of the catalyst layers were calculated. Results indicated that adding butyl acetate to the catalytic ink benefited the ionic resistance. Then, the fuel cells with the two CCMs were subzero stored at -20 degrees C with saturated residual water. After 20 freeze thaw cycles, the CCM prepared with isopropyl alcohol and butyl acetate showed less degradation in terms of polarization curves and EIS. And the ionic resistances of the both CCMs decreased to a certain extent. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: ELECTROLYTE FUEL-CELLS ;  MASS-TRANSPORT LIMITATIONS ;  COLD START ;  ELECTROCHEMICAL IMPEDANCE ;  CATHODE ;  PERFORMANCE ;  MEMBRANE ;  LAYER ;  TEMPERATURES ;  MODEL
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000284443200034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103625
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.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Fuel Cells, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Song, Wei,Yu, Hongmei,Hao, Lixing,et al. Effect of catalytic ink on sub-freezing endurance of PEMFCs[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(20):11129-11137.
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