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Copolymers of Poly(2,5-benzimidazole) and Poly[2,2′-(p-phenylene)-5,5′-bibenzimidazole] for High-Temperature Fuel Cell Applications

✍ Scribed by Sung-Kon Kim; Tae-Ho Kim; Jung-Woo Jung; Jong-Chan Lee

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
334 KB
Volume
293
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Copolymers of poly(2,5‐benzimidazole) (ABPBI) and poly[2,2′‐(p‐phenylene)‐5,5′‐bibenzimidazole] (__p__PBI) were synthesized for use as fuel cell membranes to take advantage of the properties of both constituents. The composition of the copolymers were controlled by changing the feed ratio of 3,4‐diaminobenzoic acid and terephthalic acid with 3,3′‐diaminobenzidine in the polycondensation reaction. The copolymer membranes showed higher conductivities, better mechanical properties, and larger acid absorbing abilities than commercial poly[2,2′‐(m‐phenylene)‐5,5′‐bibenzimidazole] membranes.

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