Patent ID: 7709122

Claim:
A method for producing a proton conductive electrolyte membrane comprising: laminating a dispersion liquid containing inorganic particles and inflammable organic particles on an inflammable support, the inflammable organic particles having an average particle size of 100 to 450 nm; baking the inflammable support on which the dispersion liquid is laminated; and filling a porous membrane formed of the inorganic particles obtained by the baking with an proton conductive organic material; wherein the inflammable organic particles are one selected from a group consisting of acrylic resin, styrene resin, styrene/acrylic resin, styrene/divinylbenzene resin, polyester resin and urethane resin; the inflammable support is one selected from a group consisting of filter paper, non-woven fabric, and polymer film; and the proton conductive organic material is one selected from a group consisting of: a fluorine sulfonic acid derivative, a fluorine diphosphoric acid derivative, a fluorine sulfonyl derivative, an ion-exchange resin having a skeleton of an organic polymer containing fluorine, a sulfonated plastic electrolyte, sulfoalkylated polyetheretherketone, sulfoalkylated polyethersulfone, sulfoalkylated polyetherethersulfone, sulfoalkylated polysulfone, and sulfoalkylated polysulfide.