Recoverable Performance Loss due to Membrane Chemical Degradation in PEM Fuel Cells

被引：5
|
作者：
Zhang, Jingxin [1 ]
Litteer, Brian [1 ]
Coms, Frank [1 ]
Makharia, Rohit [1 ]
机构：
[1] Gen Motors Global Res & Dev, Electrochem Energy Res Lab, Honeoye Falls, NY 14472 USA
来源：
POLYMER ELECTROLYTE FUEL CELLS 11 | 2011年 / 41卷 / 01期
关键词：
PERFLUOROSULFONIC ACID MEMBRANE; DECOMPOSITION; MECHANISM;
D O I：
10.1149/1.3635678
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Recoverable voltage loss was observed for a PEM fuel cell due to membrane chemical degradation under open circuit voltage (OCV) conditions. The anion analysis of the fuel cell effluent water, collected during both the OCV hold and voltage recovery stages, indicates that sulfate release rate is much higher during recovery than that during the OCV hold. The surge in sulfate anion release occurs simultaneously with the recovery of fuel cell voltage. It was found that the reversible voltage loss, and concurrent sulfate release rate during voltage recovery, is lower for Ce-mitigated NRE211 membrane compared to as-received membrane. The recoverable voltage loss is proposed to be mainly due to the sulfate anion generated by membrane chemical degradation adsorbing onto the platinum catalyst surface.
引用
收藏
页码：1471 / 1485
页数：15
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