Patent ID: 7544445
Filing Date: 2009-06-09
Classification: C08J,H01B,H01G,H01M,Y02E,Y02P

Abstract:
1. A polymer electrolyte membrane, comprising: a microporous polymer membrane having pores penetrating through opposite sides thereof, the microporous polymer membrane being a microporous polyimide polymer membrane with the polyimide constituting the microporous polyimide membrane comprising at least 1 mol % of 3,3′-dihydroxy-4,4′-diaminobiphenyl based on a total diamine component, the microporous polymer membrane containing a mixture of a polymer and a molten salt at a weight ratio of 1/99 to 99/1 and/or a molten salt, wherein the microporous polymer membrane comprises a heat-resistant aromatic polymer having no glass transition temperature below 100° C., the microporous polymer membrane has a percentage of void of 10 to 90% by volume, and the molten salt has a melting point of 100° C. or lower.