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题名: Absorption, desorption, and transport of water in polymer electrolyte membranes for fuel cells
作者: Ge, SH;  Li, XG;  Yi, BL;  Hsing, IM
刊名: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
发表日期: 2005
DOI: 10.1149/1.1899263
卷: 152, 期:6, 页:A1149-A1157
收录类别: SCI
文章类型: Article
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: The transport of water vapor through a Nafion membrane includes absorption of water at one membrane/gas diffusion layer interface, water transport in the membrane, and desorption of water at another interface. Based on the structure of the membrane, a model for the water transport through the membrane is presented. It was assumed that the mass-transfer coefficients for the absorption and desorption of water and the water diffusion coefficient were dependent on the volume fraction of water (f(V)) in the membrane. These parameters were determined from steady-state water transport flux through the membranes at different water activity gradients. The results show that the mass-transfer coefficient for the absorption of water (k(a) = 3.53 x 10(-5)fv m/s, 353 K) is much lower than that for the desorption of water (k(d) = 1.42 x 10(-4)fv m/s, 353 K). The parameters k(a) and k(d) describe the nonequilibrium water uptake of the membrane on operating conditions. Using these obtained parameters, the simulation results agree well with experimental data under many different conditions, including thickness of the membrane, water vapor/liquid water, temperature, and flow rate. © 2005 The Electrochemical Society. [DOI: 10.1149/ 1.1899263] All rights reserved.
关键词[WOS]: PERFLUOROSULFONIC ACID MEMBRANES ;  PROTON-EXCHANGE MEMBRANES ;  MATHEMATICAL-MODEL ;  NAFION MEMBRANES ;  MANAGEMENT ;  DIFFUSION ;  SORPTION ;  SIMULATION ;  PARAMETERS ;  RESISTANCE
语种: 英语
WOS记录号: WOS:000229475300018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139755
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.Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Res & Dev Ctr, Dalian 116023, Peoples R China

Recommended Citation:
Ge, SH,Li, XG,Yi, BL,et al. Absorption, desorption, and transport of water in polymer electrolyte membranes for fuel cells[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2005,152(6):A1149-A1157.
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