Degradation Study of Radiation Grafted Membranes under Low Humidity Conditions in Polymer Electrolyte Fuel Cells

被引：9
|
作者：
Zhang, Zhuoxiang [1 ]
Buchmueller, Yves [1 ]
Wokaun, Alexander [1 ]
Gubler, Lorenz [1 ]
机构：
[1] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland
来源：
ECS ELECTROCHEMISTRY LETTERS | 2013年 / 2卷 / 10期
关键词：
OH RADICALS; PERFORMANCE; BEHAVIOR;
D O I：
10.1149/2.002310eel
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The effect of relative humidity (RH) on membrane degradation in a polymer electrolyte fuel cell was investigated for membranes prepared by radiation grafting of styrene into ETFE base film, followed by sulfonation. During the open circuit voltage (OCV) tests, online measurement of OCV and high frequency resistance (HFR) indicated that membrane degradation was slower and less significant towards lower RH. This in situ observation was confirmed by the quantification of the degree of degradation using post-test membrane analysis by FTIR spectroscopy. The reduced membrane degradation at low RH showed a good agreement with the lower gas crossover under dry conditions. (c) 2013 The Electrochemical Society. All rights reserved.
引用
收藏
页码：F69 / F72
页数：4
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