Mechanism of Perfluorosulfonic Acid Membrane Chemical Degradation under Low RH Conditions

被引：13
|
作者：
Coms, F. D. [1 ]
Xu, H. [2 ]
McCallum, T. [2 ]
Mittelsteadt, C. [2 ]
机构：
[1] Gen Motors Co, Global Fuel Cell Act, Pontiac, MI 48340 USA
[2] Giner Inc, Newton, MA 02466 USA
来源：
POLYMER ELECTROLYTE FUEL CELLS 14 | 2014年 / 64卷 / 03期
关键词：
OXYGEN RADICALS; POLYMER; HYDROGEN;
D O I：
10.1149/06403.0389ecst
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A highly versatile and robust hydrogen peroxide vapor test has been employed to probe the chemical degradation of NRE212CS membranes under a wide variety of RH environments. Under very low RH conditions, chain scission processes become operative leading to an increase in the carboxylic acid content and a subsequent decrease in high humidity chemical stability of the membranes. Durability tests of Na+-exchanged Nafion (R) membranes were undertaken to distinguish possible chain scission mechanisms. The impact of Ce3+ mitigation was also investigated.
引用
收藏
页码：389 / 402
页数：14
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