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Poly(sulfonated phenylene)-block-Polyimide Copolymers for Fuel Cell Applications

✍ Scribed by Huiping Bi; Shouwen Chen; Xinbing Chen; Kangcheng Chen; Nobutaka Endo; Mitsuru Higa; Kenichi Okamoto; Lianjun Wang

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
178 KB
Volume
30
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Novel poly(2‐(3‐sulfo)benzoyl‐1,4‐phenylene)‐block‐polynaphthalimide (PSP‐b‐PI) copolymers were successfully synthesized by Ni(0)‐catalyzed copolymerization of 2,5‐dichloro‐3′‐sulfo‐benzophenone and dichloro‐terminated naphthalimide oligomer. The membranes exhibited a microphase‐separated structure and good hydrolytic stability at 130 °C. They showed a fairly strong anisotropy of membrane swelling with much smaller in‐plane swelling, but a rather weak anisotropy of proton conductivity. The membranes had a fairly high through‐plane conductivity in water and even under low relative humidity. The PSP‐b‐PI copolymer with an IEC of 1.5 meq · g^−1^ showed high PEFC performance due to the high through‐plane conductivity.

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