Experimental characterization of in-plane permeability of gas diffusion layers

被引:185
作者
Feser, J. P. [1 ]
Prasad, A. K. [1 ]
Advani, S. G. [1 ]
机构
[1] Univ Delaware, Dept Mech Engn, Fuel Cell Res Lab, Newark, DE 19716 USA
关键词
permeability; GDL; fuel cells; measurements; porous media; radial flow; PEMFC CATHODE;
D O I
10.1016/j.jpowsour.2006.07.058
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
Recent studies indicate that PEM fuel cell performance may be strongly influenced by in-plane permeability of the gas diffusion layer (GDL). The current study employs a radial flow technique for obtaining in-plane permeability of GDLs, using either gas or liquid as the impregnating fluid. A model has been developed and experimentally verified to account for compressibility effects when permeability measurements are conducted using a gas. Permeability experiments are performed on samples of woven, non-woven, and carbon fiber-based GDL at various levels of compression using air as the impregnating fluid. Woven and non-woven samples are measured to have significantly higher in-plane permeability compared to carbon fiber paper at similar solid volume fractions. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:1226 / 1231
页数:6
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