Phosphosilicate gel, proton conductive material and method for producing the same

摘要

PROBLEM TO BE SOLVED: To provide a proton conductive material or membrane excellent in proton conductivity and less in its deterioration even under a high temperature or high humidity condition, and also provide its production method. SOLUTION: The proton conductive material comprises a phosphosilicate gel which is produced by adding an aluminum compound and/or boron compound and phosphoric acid to a contactant of the water containing an acidic condensation catalyst and a silane compound containing a tetraalkoxysilane and an alkyltrialkoxysilane, mixing them to form a sol, gelling the obtained sol, and then heat treating.