Microporous layer coated gas diffusion layers for enhanced performance of polymer electrolyte fuel cells

被引:136
作者
Kitahara, Tatsumi [1 ]
Konomi, Toshiaki [1 ]
Nakajima, Hironori [1 ]
机构
[1] Kyushu Univ, Fac Engn, Dept Mech Engn, Nishi Ku, Fukuoka 8190395, Japan
关键词
Polymer electrolyte fuel cell; Gas diffusion layer; Microporous layer; Gas permeability; Hydrophobicity; Water management; WATER MANAGEMENT; PEMFC;
D O I
10.1016/j.jpowsour.2009.10.089
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The influence of microporous layer (MPL) design parameters for gas diffusion layers (GDLs) on the performance of polymer electrolyte fuel cells (PEFCs) was clarified. Appropriate MPL design parameters vary depending on the humidification of the supplied gas. Under low humidification, decreasing both the MPL pore diameter and the content of polytetrafluoroethylene (PTFE) in the MPL is effective to prevent drying-up of the membrane electrode assembly (MEA) and enhance PEFC performance. increasing the MPL thickness is also effective for maintaining the humidity of the MEA. However, when the MPL thickness becomes too large, oxygen transport to the electrode through the MPL is reduced, which lowers PEFC performance. Under high humidification, decreasing the MPL mean flow pore diameter to 3 Pm is effective for the prevention of flooding and enhancement of PEFC performance. However, when the pore diameter becomes too small, the PEFC performance tends to decrease. Both reduction of the MPL thickness penetrated into the substrate and increase in the PTFE content to 20 mass% enhance the ability of the MPL to prevent flooding. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:2202 / 2211
页数:10
相关论文
共 16 条
[1]  
American Society for Testing and Materials Committee, 1970, F31686 ASTM COMM, P722
[2]   Novel gas diffusion layer with water management function for PEMFC [J].
Chen, J ;
Matsuura, T ;
Hori, M .
JOURNAL OF POWER SOURCES, 2004, 131 (1-2) :155-161
[3]   An innovative technique for pore structure analysis of fuel cell and battery components using flow porometry [J].
Jena, A ;
Gupta, K .
JOURNAL OF POWER SOURCES, 2001, 96 (01) :214-219
[4]  
KITAHARA T, 2008, T JAPAN SOC MECH E B, P2221
[5]  
KITAHARA T, 2007, ECS T, P27
[6]  
KITAHARA T, 2008, ECS T, P1603
[7]  
KITAHARA T, 2006, T JAPAN SOC MECH E B, P1007
[8]  
KONOMI T, 2006, T JAPAN SOC MECH E B, P764
[9]  
KONOMI T, 2005, T JAPAN SOC MECH E B, P1428
[10]  
MATHIAS M., 2003, HDB FUEL CELLS FUNDA, V3, DOI [10.1002/9780470974001.f303046, DOI 10.1002/9780470974001.F303046]