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Abstract
Sponge-Nafion membranes were prepared by electro-spinning (ES) method and with polyacrylonitrile (PAN) or polyvinylpyrrolidone (PVP) as additives. First the optimum conditions of ES were achieved to prepare Nafion membranes with sponge-like structure. Then the membranes were further processed by electrostatic spray method to enhance their properties. SEM, IR were used to characterize the morphologies and structure. Proton conductivity was measured by the CHI66C electrochemical workstation (Shanghai Chen Hua Instrument Company). Results showed that the sponge-Nafion membranes possessed better proton conductivity especially at relatively high temperatures than that of commercial Nafion membranes.