PEM fuel cell stacks operated under dry-reactant conditions

被引:79
作者
Qi, ZG [1 ]
Kaufman, A [1 ]
机构
[1] H Power Corp, Belleville, NJ 07109 USA
关键词
double-path-type flow-field; PEM fuel cells; stack;
D O I
10.1016/S0378-7753(02)00111-8
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
A double-path-type flow-field design that has two gas inlets and two gas outlets is presented for PEM fuel cells. The two paths are arranged in such a way that the inlet of one flow-field is adjacent to the outlet of the other flow-field and, within any section of the electrode active area, there are always adjacent channels with reactant flowing in opposite directions. Such a design enables the dry entering gas to become hydrated by acquiring some moisture from the exiting moist gas; and, within any section of the active area, the drier gas in one flow-field can share the moisture in the wetter gas flowing in the other flow-field. Such a design effectively uses the water produced by the stack to hydrate the membrane and the catalyst layers. The effectiveness of this design was demonstrated by running multiple-cell stacks where the stack could run stably at a current density up to 0.33 A/cm(2) using dry hydrogen and dry air. (C) 2002 Elsevier Science B.V All rights reserved.
引用
收藏
页码:469 / 476
页数:8
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