Properties of ab-PBI membranes for fuel cells

被引：2
|
作者：
Uchida, H
Yamada, Y
Asano, N
Watanabe, M
Litt, M
机构：
[1] Univ Yamanashi, Grad Sch Engn, Kofu, Yamanashi 4008511, Japan
[2] Case Western Reserve Univ, Dept Macromol Sci, Cleveland, OH 44106 USA
[3] Univ Yamanashi, Clean Energy Res Ctr, Kofu, Yamanashi 4008510, Japan
来源：
ELECTROCHEMISTRY | 2002年 / 70卷 / 12期
关键词：
polybenzimidazole; polymer electrolyte membrane; fuel cell;
D O I：
10.5796/electrochemistry.70.943
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Poly (2,5-benzimidazole) (ab-PBI) membranes were characterized for use as electrolytes in fuel cells operating at elevated temperatures (100 to 200 degreesC). The conductivity of phosphoric acid-doped ab-PBI was as high as 0.12 S cm(-1) at temperatures below 120 degreesC, but it decreased to 0.025 S cm(-1) above 150 degreesC due to a dehydration of the doped acid. Using the H3PO4-doped ab-PBI, H-2/O-2 fuel cell could be operated at 120 degreesC with a low humidification of reactant gases, although it was necessary to keep the acid-doping level high in both the membrane and the electrodes.
引用
收藏
页码：943 / 945
页数：3
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