PREPARATION AND PROPERTIES OF H3PO4-DOPED ABPBI/SiWA/SiO2 PROTON-CONDUCTING MEMBRANES FOR HIGH TEMPERATURE FUEL CELLS

摘要

Composite membranes were prepared by polymerization of 3,4-diaminobenzoic acid with SiWA/SiO2 in polyphosphoric acid (PPA). The composite membranes were prepared by casting the polymerization solutions directly onto stainless steel plates and immediately quenched to-60°C use liquid nitrogen. The composite membranes were characterized in detail by IR, XRD, TGAand SEM. The proton conductivity ofmembrane exhibits 3.7×10-3S cm-1 at 160 °C under 100% relative humidity.