POLYMER ELECTROLYTE MEMBRANE AND METHOD FOR PRODUCING THE SAME, MEMBRANE-ELECTRODE ASSEMBLY AND FUEL BATTERY CELL EACH USING THE POLYMER ELECTROLYTE MEMBRANE, AND METHOD FOR EVALUATING ION CONDUCTIVITY OF POLYMER ELECTROLYTE MEMBRANE

摘要

A producing method of a polymer electrolyte membrane is provided in which a polymer electrolyte membrane can be easily obtained having excellent ion conductivity in the thickness direction. The preferred producing method of the polymer electrolyte membrane of the present invention is a producing method of the polymer electrolyte membrane having a micro phase separation structure, including an evaporating step of evaporating a solvent from a solution containing the polymer electrolyte having an ion conductive group, wherein a time from start to completion of the evaporation of the solvent is 60 minutes or less in the evaporating step.