Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 19, Pages 5332-5341Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.04.078
Keywords
Polymer electrolyte fuel cells (PEFC); Topologically equivalent pore network (TEPN); Gas diffusion layer (GDL); Relative permeability; Liquid water distribution
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Funding
- DOE
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A topologically equivalent pore network (TEPN) model is developed for the first time to extract pore networks directly from gas diffusion layer (GDL) microstructures and thus account for all structural features of a GDL material. A generic framework of TEPN modeling is presented to design GDL structures that enable improved water management. With TEPNs used as input to a two-phase flow simulator, constitutive relations and steady-state liquid saturation profiles for carbon paper and carbon cloth are obtained and reported in this work. The results indicate a strong influence of the GDL morphology on water transport characteristics, which helps unravel the structure-performance relationship for GDLs. (C) 2010 Elsevier Ltd. All rights reserved.
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