| 초록 |
Sulfonated poly (ether ether ketone) (sPEEK)/ mesoporous benzene-silica electrolyte composite membranes were prepared by a solvent casting method. Components was mixed well in N,N-dimethyl acetamide up to 20wt% of mesoporous benzene-silica powder. By SAXS (Small-Angel X-ray Scattering) and TEM, 3-D cubic-structure (Im3m) was conformed. And by Nitrogen adsorption- desorption, BET surface area, total pore volume and average pore diameter was determined. The composite membranes showed higher proton conductivity than the pristine sPEEK membrane and the conductivity increase with the temperature but still lower than that of Nafion at high relative humidity (95%). But at low humidity, composite membranes showed better conductive properties than that of Nafion 117. For instance, at 40% relative humidity, when the temperature rises up to 70%, Nafion 117’s conductivity drops dramatically while composite membranes remains reasonable value of conductivity. |
