Proton Conducting Membrane Prepared from Organic-Inorganic Hybrid Precursor for Intermediate Temperature Fuel Cells

摘要

Proton conducting membranes were prepared by using epoxy-resin-silica hybrid polymer as flexible matrix and Cs-doped phosphotungstic acid PWA (Cs-PWA) as proton conducting networks. Cs-PWA was well dispersed and the membranes exhibited good flexibility. Thermogravimetric analysis indicated that the membranes were stable at temperatures up to about 230°C. Proton conductivity of the membrane with a weight ratio of Cs-PWA/E201=1.6 were about 8.1×10.4 Scm.1 at 160°C and 80% relative humidity. Their conductivity was improved by increasing volume fraction of Cs-PWA, which was successful after Cs-PWA was ground to nano-sized particles.