Proton conductive resin composition, method for preparing the same, and proton conductive membrane comprising the composition

The invention provides a proton conductive resin composition from which proton conductive membranes exhibiting high proton conductivity can be obtained without treatment to increase the acid concentration in the membrane. The invention also provides a method for preparing the composition, and a proton conductive membrane comprising the composition. The proton conductive resin composition comprises a silica and a proton conductive sulfonated polyarylene. The method for preparing proton conductive resin compositions comprises mixing aggregates of silica powder having an average aggregate diameter of not more than 50 nm with a sulfonated polyarylene.