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题名: Degradation mechanism of polystyrene sulfonic acid membrane and application of its composite membranes in fuel cells
作者: Yu, JR;  Yi, BL;  Xing, DM;  Liu, FQ;  Shao, ZG;  Fu, YZ
通讯作者: 于景荣
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2003
DOI: 10.1039/b209020a
卷: 5, 期:3, 页:611-615
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
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The lifetime behavior of a H-2/O-2 proton exchange membrane (PEM) fuel cell with polystyrene sulfonic acid (PSSA) membrane have been investigated in order to give an insight into the degradation mechanism of the PSSA membrane. The distribution of sulfur concentration in the cross section of the PSSA membrane was measured by energy dispersive analysis of X-ray, and the chemical composition of the PSSA membrane was characterized by infrared spectroscopy before and after the lifetime experiment. The degradation mechanism of the PSSA membrane is postulated as: the oxygen reduction at the cathode proceeds through some peroxide intermediates during the fuel cell operation, and these intermediates have strong oxidative ability and may chemically attack the tertiary hydrogen at the a carbon of the PSSA; the degradation of the PSSA membrane mainly takes place at the cathode side of the cell, and the loss of the aromatic rings and the SO3- groups simultaneously occurs from the PSSA membrane. A new kind of the PSSA-Nafion composite membrane, where the Nafion membrane is bonded with the PSSA membrane and located at the cathode of the cell, was designed to prevent oxidation degradation of the PSSA membrane in fuel cells. The performances of fuel cells with PSSA-Nafion101 and PSSA-recast Nafion composite membranes are demonstrated to be stable after 835 h and 240 h, respectively.
关键词[WOS]: PROTON-EXCHANGE MEMBRANES ;  POLYMER ELECTROLYTE ;  CATALYST LAYER ;  IONOMER MEMBRANES ;  TECHNOLOGIES ;  PERFORMANCE ;  OXYGEN ;  CARBON
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000180427300026
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82459
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

Recommended Citation:
Yu, JR,Yi, BL,Xing, DM,et al. Degradation mechanism of polystyrene sulfonic acid membrane and application of its composite membranes in fuel cells[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2003,5(3):611-615.
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