Blend Membranes of Highly Phosphonated Polysulfone and Polybenzimidazoles for High Temperature Proton Exchange Membrane Fuel Cells

摘要

The aim of the presented work is to develop a polymer electrolyte having the specific composition of polysulfone (PSU) with phosphonic acid groups in the tethered form and polybenzimidazoles, doped with phosphoric acid, which facilitates self-ion transfer. The blended membranes show high proton conductivity (3.8 × 10~(-2) S/cm at 170℃ at 25% RH) and have good thermal and mechanical properties.