The mesoporous silica - poly (vinyl alcohol) hybrid polymer electrolyte membranes were successfully synthesized with 140μm thickness. The membrane has multiple layered structures, in which the both the top and bottom layers were mainly PVA and middle layer was composed of mesoporous silica hydrogel with PVA. The mesoporous silica - PVA hybrid membranes possessed well-resolved hexagonal mesoporous channel. We found that as increasing the acidity of heteropolyacids, the proton conductivity of the membrane was also increased. The proton conductivities of the hybrid membranes with PW, PMo and SiW at high temperature (70°C ∼) were higher than that of Nafion® membrane. Applications of the mesoporous silica PVA composite membranes to DMFC seems to be promising at high temperature (>70°C).
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry