▎ 摘　　要

NOVELTY - Functionalized graphene oxide polybenzimidazole (I) or its derivatives are new. USE - Used as functionalized graphene oxide polybenzimidazole or its derivatives. ADVANTAGE - (I) have improves conductivity of nano compound proton exchange film, mechanical properties and dimensional stability, and high temperature performance of fuel cell. DETAILED DESCRIPTION - Functionalized graphene oxide polybenzimidazole of formula (I) or its derivatives are new. Pn = polybenzimidazole, preferably moiety of formula 2-methyl-2'-m-tolyl-3H,3'H-5,5'-bibenzo(d)imidazole (II), 2,6-dimethyl-1H-benzo(d)imidazole moiety of formula (III), 2-methyl-6-(2-m-tolyl-1H-benzo(d)imidazol-6-yloxy)-1H-benzo(d)imidazole moiety of formula (IV), 6-methyl-2-m-tolyl-1,5-dihydroindeno(5,6-d)imidazole moiety of formula (V), 2-methyl-2'-(4-(p-tolyloxy)phenyl)-3H,3'H-5,5'-bibenzo(d)imidazole moiety of formula (VI), 2-methyl-6-(2-(4-(p-tolyloxy)phenyl)-1H-benzo(d)imidazol-6-yloxy)-1H-benzo(d)imidazole moiety of formula (VII) or 6-methyl-2-(4-(p-tolyloxy)phenyl)-1,7-dihydroindeno(5,6-d)imidazole moiety of formula (VIII). An INDEPENDENT CLAIM is also included for preparation of (I).