Journal
JOURNAL OF POWER SOURCES
Volume 162, Issue 2, Pages 1226-1231Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2006.07.058
Keywords
permeability; GDL; fuel cells; measurements; porous media; radial flow
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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.
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