SOLID POLYMER ELECTROLYTE MEMBRANE AND FUEL CELL

摘要

Disclosed is a solid polymer electrolyte membrane which is excellent in methanol impermeability, while maintaining high proton conductivity. Also disclosed is a fuel cell comprising such a solid polymer electrolyte membrane. Specifically disclosed is a solid polymer electrolyte membrane which is obtained by impregnating a polyolefin porous membrane with a vinyl monomer having a basic group and a crosslinkable vinyl monomer, at least one of which monomers has an aromatic ring or a heterocyclic ring, then polymerizing the monomers, and then subjecting the resulting membrane to a sulfonation treatment. Also specifically disclosed is a fuel cell comprising the solid polymer electrolyte membrane, and a positive electrode and a negative electrode sandwiching the solid polymer electrolyte membrane.