Gypsum Based Proton Conductive Hybrid Electrolyte Membrane

Abstract

The proton conductive membrane for the intermediate temperature fuel cell was fabricated using phosphoric acid treated gypsum and silicone based materials. The ionic conductivity of the membrane was estimated to be 1.6×10^-5 S/cm by AC impedance measurement at 165°C. The conductivity of the membrane rose continuously with the rise of temperature beyond 100°C. This suggests that the proton conduction in the membrane does not require water molecules and the membrane might be used in intermediate temperature fuel cell without water supply.