Water transport in a PEM fuel cell with slanted channel flow field plates

被引：16

作者：

Wawdee, Preeyaphat ^{[1
,2
]}

Limtrakul, Sunun ^{[1
,2
]}

Vatanatham, Terdthai ^{[1
,2
]}

Fowler, Michael W. ^{[3
]}

机构：

[1] Kasetsart Univ, Fac Engn, Dept Chem Engn, Bangkok 10900, Thailand

[2] Kasetsart Univ, Dept Chem Engn, Fac Engn, Ctr Excellence Petrochem & Mat Technol, Bangkok 10900, Thailand

[3] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 09期

关键词：

Proton exchange membrane fuel cell; Flow field; Water management; Water measurement; Slanted channel; Back diffusion; PERFORMANCE;

D O I：

10.1016/j.ijhydene.2015.01.037

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：

Cell humidification is an important factor affecting PEM fuel cell performance. A new cell was designed with slanted grooves on both cathode and anode sides to improve water management. Water transport measurements provided information on flooding, hydration, and back-diffusion. The results showed less water flowing out from the cathode side of an anode down-slanted channel than from that of a rectangular channel, because anode down-slanting induced a hydration gradient which caused water back-diffusion into the anode, leading to better performance due to improved membrane hydration and conductivity. At high humidification, performance decreased because of condensation and blocking of the gas diffusion layer, but replacing the rectangular channel with an anode down-slanted channel improved performance to match that of a rectangular cell at normal humidification. However, the cathode down-slanted channel showed membrane dehydration due to water draining away. Moreover, anode or cathode up-slanted channels. induced flooding, leading to poor performance. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：3739 / 3748

页数：10

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