ELECTROLYTE MEMBRANE, METHOD FOR PRODUCING MEMBRANE ELECTRODE ASSEMBLY, AND FUEL CELL

摘要

An electrolyte membrane for fuel cells having a structure wherein a porous base is filled with an electrolyte polymer is disclosed which has solved problems of lack of adhesion to an electrode and easily occurring flooding. This electrolyte membrane for fuel cells suppresses permeation of the fuel, and can be produced with high productivity at low cost. A method for produci ng an electrolyte membrane is disclosed wherein pores of a porous base are fill ed with an electrolyte polymer while exposing the surface of the porous base. T he method for producing an electrolyte membrane is characterized in that the polymer is obtained from an ion exchange group-containing monomer or from a solution or dispersion wherein other components are blended to the monomer according to needs.