Direct measurement of the capillary pressure characteristics of water-air-gas diffusion layer systems for PEM fuel cells

被引：105

作者：

Gostick, Jeff T. ^{[1
]}

Ioannidis, Marios A. ^{[1
]}

Fowler, Michael W. ^{[1
]}

Pritzker, Mark D. ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 5N5, Canada

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2008年 / 10卷 / 10期

关键词：

Capillary pressure; Hysteresis; Water management;

D O I：

10.1016/j.elecom.2008.08.008

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A method and apparatus for measuring the relationship between air-water capillary pressure and water saturation in PEMFC gas diffusion layers is described. Capillary pressure data for water injection and withdrawal from typical GDL materials are obtained, which demonstrate permanent hysteresis between water intrusion and water withdrawal. Capillary pressure, defined as the difference between the water and gas pressures at equilibrium, is positive during water injection and negative during water withdrawal. The results contribute to the understanding of liquid water behavior in GDL materials which is necessary for the development of effective PEMFC water management Strategies. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1520 / 1523

页数：4

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