Patent ID: 9276282
Filing Date: 2016-03-01
CPC Classification: C08G,H01M,Y02E

Claim Text:
1. An acidic electrolyte flow battery, comprising: an ion exchange membrane comprising an aromatic polymer, wherein the aromatic polymer is a homopolymer of polybenzimidazole having a structural unit of formula I: or a copolymer of polybenzimidazole having a structural unit of formula II: wherein R R 2 and R 5 are independently chosen from hydrogen, C 1 -C 4 alkyl groups, or C 2 -C 4 alkenyl groups, and wherein x is an integer ranging from 10 to 200, wherein a weight average molecular weight of the aromatic polymer ranges from 5000 to 800000, wherein m and n represent molar fractions of corresponding structural units in said copolymer, 0<n≦8, 0.2≦m<1, m+n=1.