Novel PA-doped polybenzimidazole membranes with high doping level, high proton conductivity and high stability for HT-PEMFCs†
Abstract
A novel high temperature proton exchange membrane (HT-PEM) with a high phosphoric acid (PA) doping level of 24.6, high proton conductivity of 0.217 S cm−1 at 200 °C, as well as excellent mechanical-dimensional stability was prepared based on a structure-designed polybenzimidazole (PBI).