Progress of high temperature polybenzimidazole proton exchange membrane: a systematic review

Abstract Proton exchange membrane (PEM) is the core component of proton fuel cell. Generally speaking, ordinary PEM has poor barrier to (especially liquid fuel) and conduction a strong dependence on water molecules. Compared with PEM, high temperature cell works in non-water environment, which overcomes above problems. Besides, system complex low impurity much simpler flow field design. Polybenzimidazole (PBI) not only meets requirements temperature, but also higher conductivity than i.e., best material for PEM. From this point view, properties fabrication PBI are systematically reviewed. Specifically, factors influencing performance acid doped as well existing problems (high degradation chemical oxidative degradation) demonstrated. Furthermore, corresponding solutions future direction put forward.