On the role of the microporous layer in PEMFC operation

被引：253

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 | 2009年 / 11卷 / 03期

关键词：

Polymer electrolyte membrane fuel cell; Gas diffusion layer; Microporous layer; Water management; Capillary pressure; Percolation; ELECTROLYTE FUEL-CELLS; LIQUID WATER TRANSPORT; GAS-DIFFUSION LAYER; CAPILLARY-PRESSURE; NETWORK; VISUALIZATION; PEFC;

D O I：

10.1016/j.elecom.2008.12.053

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The condition of liquid water breakthrough at the cathode of polymer electrolyte fuel cells (PEMFC) is studied experimentally and data on corresponding water saturation and capillary pressure are provided for gas diffusion layers (GDL) with and without a microporous layer (MPL). The data demonstrate that the GDL saturation at water breakthrough is drastically reduced from ca. 25% to ca. 5% in the presence of MPL This observation is consistent with considerations of invasion percolation in finite-size lattices and suggests an explanation for the role of MPL in improving PEMFC performance at high current densities. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：576 / 579

页数：4

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