Numerical and microfluidic pore networks: Towards designs for directed water transport in GDLs

被引：78

作者：

Bazylak, A.

Berejnov, V.

Markicevic, B.

Sinton, D.

Djilali, N. ^{[1
]}

机构：

[1] Univ Victoria, Inst Integrated Energy Syst, Victoria, BC V8W 3P6, Canada

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 26期

基金：

加拿大自然科学与工程研究理事会;

关键词：

gas diffusion layer; porous media; two-phase now; microfluidic; polymer electrolyte membrane fuel cell; biased networks;

D O I：

10.1016/j.electacta.2008.03.078

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Based on a pore network representation of porous media, numerical and experimental methods are employed to explore the design of gas diffusion media in order to control and direct water transport. Randomized pore networks with structured biasing in both diagonal and radial directions show a marked influence on liquid water transport through the two-dimensional media. Radial biasing is shown to have the beneficial effect of decreasing the network saturation, which is a desirable quality in fuel cell gas diffusion layers. Similar flow patterns are obtained from both numerical Simulations and experiments, and it is found that relatively small radial biasing can yield a 43% decrease in average saturation compared to pore networks without a prescribed radial gradient. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：7630 / 7637

页数：8

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