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题名: Degradation study on MEA in H3PO4/PBI high-temperature PEMFC life test
作者: Zhai, Yunfeng;  Zhang, Huamin;  Liu, Gang;  Hu, Jingwei;  Yia, Baolian
通讯作者: 张华民
刊名: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
发表日期: 2007
DOI: 10.1149/1.2372687
卷: 154, 期:1, 页:B72-B76
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 303
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Materials Science, Coatings & Films
研究领域[WOS]: Electrochemistry ;  Materials Science
英文摘要: In this paper, 550 h (500 h continuous and 50 h intermittent) high-temperature proton exchange membrane fuel cell (PEMFC, phosphoric acid-doped polybenzimidazole system, H3PO4/PBI) life test was performed without humidification at 150 degrees C; constant current (at 640 mA cm(-2)) performance and polarization curves were recorded. Electrochemical and physical characterizations were applied to investigate the degradation of the membrane electrode assembly (MEA). The results showed that the constant current performance started to reduce with a rate of 0.18 mV h(-1) after about 90 h activation. Surface area loss of the cathode platinum due to agglomeration was detected by cyclic voltammetry and transmission electron microscopy. A slight increase of internal resistance of the single cell due to H3PO4 leaching was found by electrochemical impedance spectroscopy and energy dispersive X-ray analysis. H-2 permeability of MEA increased during the last 50 h intermittent test because of appearing of cracks, that were detected by linear sweep voltammetry and scanning electron microscopy. These results suggested that catalyst agglomeration and H3PO4 leaching from catalyst layers contributed to the performance degradation of the MEA during the life test, and mechanical properties degradation of H3PO4/PBI membrane impacted badly the lifetime of the single cell. (c) 2006 The Electrochemical Society.
关键词[WOS]: ACID DOPED POLYBENZIMIDAZOLE ;  MEMBRANE FUEL-CELLS ;  POLYMER ELECTROLYTE ;  PHOSPHORIC-ACID ;  SUPPORTED PLATINUM ;  OXYGEN REDUCTION ;  CARBON ;  CONDUCTIVITY ;  OPERATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000242538600022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99505
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, Proton Exchange Membrane Fuel Cell Key Mat & Tech, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Zhai, Yunfeng,Zhang, Huamin,Liu, Gang,et al. Degradation study on MEA in H3PO4/PBI high-temperature PEMFC life test[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2007,154(1):B72-B76.
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