Constructing novel cross-linked polybenzimidazole network for high-performance high-temperature proton exchange membrane

Compared with linear polybenzimidazole (PBI) membranes, cross-linked phosphoric acid (PA)-PBI membranes with superior mechanical strength have greater potential for application in high-temperature proton exchange membrane fuel cells (HT-PEMFCs). However, performances of conventional cross-linked membranes are usually limited by densely cross-linked network, and reduced concentration of proton-conductive imidazole units. Therefore, it still...