| 摘要 |
[PROBLEMS] To provide a proton conductive film, which, while maintaining high proton conductivity, can realize high impact resistance and high polar solvent resistance and, at the same time, can improve adhesion to an electrode, and can improve power generation performance, a membrane-electrode assembly, and a solid polymer electrolyte fuel cell. [MEANS FOR SOLVING PROBLEMS] A proton conductive film comprising a silicon-oxygen linked-type structure (A), having a crosslinking structure formed by a silicon-oxygen linkage, and an acid radical-containing structure (B) covalently bonded to a silane compound and containing an acid radical, which have been linked to each other by a silicon-oxyen linkage, wherein the acid group-containing structure (B) contains a structure comprising a polymerizable unsaturated double bond-containing silane compund (a) and an acid radical-containing compound (b) having a polymerizabl unsaturated double bond which have been covalently bonded to each other. |
