Measurement of MacMullin Numbers for PEMFC Gas-Diffusion Media

被引：68

作者：

Martinez, Michael J. ^{[1
]}

Shimpalee, Sirivatch ^{[1
]}

Van Zee, J. W. ^{[1
]}

机构：

[1] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2009年 / 156卷 / 01期

基金：

美国国家科学基金会;

关键词：

porosity; porous materials; proton exchange membrane fuel cells; ELECTROLYTE FUEL-CELLS; CATALYST LAYER; MODEL;

D O I：

10.1149/1.3005564

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A technique for measuring the MacMullin number is described and the values are reported for different carbon-cloth and carbon-paper gas-diffusion media (GDM). This number provides the missing data to test the applicability of the commonly used Bruggeman equation for these porous structures. Analysis of the MacMullin number and porosity data show that only carbon-cloth GDM follow the Bruggeman equation and that carbon-paper GDM has a different relationship with porosity. These differences are discussed in terms of path length created by the orientation of fibers of each GDM.

引用

页码：B80 / B85

页数：6

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