期刊
JOURNAL OF POWER SOURCES
卷 193, 期 2, 页码 639-648出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.03.059
关键词
PEM; Fuel cell; Current distribution; Current density; Flow field
One of the most common types of How field designs used in proton exchange membrane (PEM) fuel cells is the serpentine flow field. It is used for its simplicity of design, its effectiveness in distributing reactants and its water removal capabilities. The knowledge about where current density is higher, tinder the land or the channel, is critical for flow field design and optimization. Yet, no direct measurement data are available for serpentine flow fields. In this study a fuel cell with a single channel serpentine How field is used to separately measure the current density under the land and channel, which is either catalyzed or insulated on the cathode. In this manner. a systematic study is conducted under a wide variety of conditions and a series of comparisons are made between land and channel current density. The results show that under most operating conditions, current density is higher under the land than that under the channel. However, at low voltage, a rapid drop off in current density occurs under the land clue to concentration losses. The mechanisms for the direct measurement results and general guidelines for serpentine flow field design and optimizations are provided. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据