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题名: Primary study on degradation mechanism of polystyrenesulfonic acid membrane and its composite membrane in fuel cells
作者: Yu, JR;  Yi, BL;  Xing, DM;  Liu, FQ;  Zhang, HM;  Xu, Q;  Liang, XM
关键词: proton-exchange membrane fuel cells ;  polystyenesulfonic acid membrane ;  degradation mechanism ;  high-performance liquid chromatography ;  energy dispersive spectrograph ;  infrared spectra
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
发表日期: 2002-09-01
卷: 23, 期:9, 页:1792-1796
收录类别: SCI
文章类型: Letter
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The lifetime behavior of the proton exchange membrane fuel cell (PEMFC) fabricated with polystyenesulfonic acid (PSSA) membrane was investigated in order to present the degradation mechanism of the PSSA membrane. The water evacuated from the anode and the cathode of the cell during the lifetime experiment was analyzed by the method of high-performance liquid chromatogram. The distribution of S concentration in the cross-section of the PSSA membrane was measured by energy dispersive spectrograph. Infrared spectroscopic measurements were carried out to investigate the structure of the PSSA membrane before and after the fuel cell experiment. The degradation mechanism of the PSSA membrane is indicated as that: during the fuel cell operation, the reduction of O-2 gas at the cathode proceeds through a peroxide intermediate. H2O2 reacts with the trace metal ions in the cell to form HO., HO2. and other oxidation radicals, which can chemically attack the tertiary hydrogen at the a-carbon of the PSSA membrane. The degradation of the PSSA membrane mainly occurs from the cathode of the cell. The loss of the aromatic ring and the SO3- group simultaneously occurs from the PSSA membrane. A PSSA-Nafion composite membrane was prepared according to the above-mentioned degradation mechanism of the PSSA membrane. The Nafion 101 membrane of 25 mum thickness is located at the cathode. The PEMFC with the PSSA-Nafion composite membrane could be operated steadily for more than 800 hours without significant performance deterioration.
语种: 英语
WOS记录号: WOS:000178056800042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139066
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, Fuel Cell R&D Ctr, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Grp Pharmaceut Chem, Dalian 116011, Peoples R China

Recommended Citation:
Yu, JR,Yi, BL,Xing, DM,et al. Primary study on degradation mechanism of polystyrenesulfonic acid membrane and its composite membrane in fuel cells[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2002,23(9):1792-1796.
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