Durability studies of PBI-based high temperature PEMFCs

被引:272
作者
Yu, S. [1 ]
Xiao, L. [2 ]
Benicewicz, B. C. [1 ]
机构
[1] Rensselaer Polytech Inst, New York State Ctr Polymer Synth, Dept Chem & Chem Biol, Troy, NY 12110 USA
[2] BASF Fuel Cell Inc, Somerset, NJ 08873 USA
关键词
polybenzimidazole; high temperature PEM fuel cell; membrane durability; phosphoric acid loss; long term testing; voltage degradation;
D O I
10.1002/fuce.200800024
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Long-term durability testing of polybenzimidazole (PBI)-based polymer electrolyte membrane (PEM) fuel cells was performed using test protocols designed to simulate fuel cell operational situations which may be found in real applications. The fuel cell voltages and phosphoric acid (PA) loss were carefully monitored over thousands of hours and hundreds of cycles. In the typical operating range for high temperature PEM fuel cells (160 degrees C), the fuel cell voltage degradation rate was 4.9 mu V h(-1) for steady-state operation. The PA loss rates were generally low and indicated that long-term operation (> 10,000 h) was possible without significant performance degradation due to PA loss from the membrane. Dynamic durability tests also showed that the PA loss rate from the membrane electrode assemblies (MEAs) depended on cell operating temperature and load conditions. Under all conditions, the PA loss was a relatively small amount of the total PA in the membrane.
引用
收藏
页码:165 / 174
页数:10
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