Benzimidazole-substituted polybenzimidazoles as base material for the production of proton-conducting membranes

摘要

The invention relates to application of benzimidazole-substituted polybenizimidazole polymers as initial material for preparing proton-conductive membranes, preferably used in high-temperature fuel cells. Detail methods are provided, comprising the steps of obtaining the polymers, preparing film containing the polymer, doping the film with predetermined acid, thereby forming a proton-conductive membrane with improved proton conductivity. Particularly, a group consisting of three types of the polymers is described. In a preferred embodiment, the predetermined acid is being phosphoric acid.