Modeling liquid water transport in gas diffusion layers by topologically equivalent pore network

被引：68

作者：

Luo, Gang

Ji, Yan

Wang, Chao-Yang ^{[1
]}

Sinha, Puneet K.

机构：

[1] Penn State Univ, Electrochem Engine Ctr ECEC, University Pk, PA 16802 USA

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 19期

关键词：

Polymer electrolyte fuel cells (PEFC); Topologically equivalent pore network (TEPN); Gas diffusion layer (GDL); Relative permeability; Liquid water distribution; MEMBRANE FUEL-CELLS; 2-PHASE FLOW; BEHAVIOR;

D O I：

10.1016/j.electacta.2010.04.078

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：5332 / 5341

页数：10

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