Absorption, desorption, and transport of water in polymer electrolyte membranes for fuel cells

被引:247
作者
Ge, SH [1 ]
Li, XG
Yi, BL
Hsing, IM
机构
[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
关键词
D O I
10.1149/1.1899263
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
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. (c) 2005 The Electrochemical Society. [DOI: 10.1149/ 1.1899263] All rights reserved.
引用
收藏
页码:A1149 / A1157
页数:9
相关论文
共 58 条
[1]   Water management in PEM fuel cells [J].
Berg, P ;
Promislow, K ;
St Pierre, J ;
Stumper, J ;
Wetton, B .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (03) :A341-A353
[2]   A MATHEMATICAL-MODEL OF THE SOLID-POLYMER-ELECTROLYTE FUEL-CELL [J].
BERNARDI, DM ;
VERBRUGGE, MW .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1992, 139 (09) :2477-2491
[3]   Oxygen and hydrogen permeation properties and water uptake of Nafion(R) 117 membrane and recast film for PEM fuel cell [J].
Broka, K ;
Ekdunge, P .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (02) :117-123
[4]  
BUCHI EN, 2001, J ELECT SOC, V148, pA183
[5]   Transient behavior of water transport in the membrane of a PEM fuel cell [J].
Chen, FL ;
Su, YG ;
Soong, CY ;
Yan, WM ;
Chu, HS .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2004, 566 (01) :85-93
[6]   Sorption in proton-exchange membranes - An explanation of Schroeder's paradox [J].
Choi, PH ;
Datta, R .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (12) :E601-E607
[7]   Fuel cells for portable applications [J].
Dyer, CK .
JOURNAL OF POWER SOURCES, 2002, 106 (1-2) :31-34
[8]   Phenomenological theory of electro-osmotic effect and water management in polymer electrolyte proton-conducting membranes [J].
Eikerling, M ;
Kharkats, YI ;
Kornyshev, AA ;
Volfkovich, YM .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (08) :2684-2699
[9]  
Fuller TF, 1992, Solid-polymer-electrolyte fuel cells
[10]   Thermodynamics of water vapor uptake in perfluorosulfonic acid membranes [J].
Futerko, P ;
Hsing, IM .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (06) :2049-2053