Estimation of Local Relative Humidity in Cathode Catalyst Layers of PEMFC

被引：3

作者：

Gazzarri, Javier ^{[1
]}

Xia, Zetao ^{[1
]}

Zhao, Xinsheng ^{[1
]}

Wang, Qianpu ^{[1
]}

Eikerling, Michael ^{[2
]}

Liu, Simon ^{[1
]}

Xie, Zhong ^{[1
]}

机构：

[1] Inst Fuel Cell Innovat, Natl Res Council, 4250 Wesbrook Mall, Vancouver, BC V6T 1W5, Canada

[2] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

来源：

PROTON EXCHANGE MEMBRANE FUEL CELLS 9 | 2009年 / 25卷 / 01期

关键词：

ELECTROCHEMICAL IMPEDANCE;

D O I：

10.1149/1.3210675

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A method is presented to estimate the local relative humidity in cathode catalyst layers of PEM fuel cells. Based on impedance measurements under different experimental conditions, this technique allows the estimation of an average value for relative humidity using a correlation with the catalyst layer effective proton resistance. A fully humidified anode was found to increase the relative humidity of the nominally drier cathode because of water permeation through the membrane, to as much as almost 70% for a nominal 30% when the anode RH was held at 100%.

引用

页码：1203 / 1210

页数：8