POLYMER ELECTROLYTE MEMBRANE, LAMINATE THEREOF, AND THEIR PRODUCTION METHODS

摘要

Disclosed is a method for producing a laminate wherein an ion conductive polymer electrolyte membrane is arranged on a supporting base in such a manner that one side of the polymer electrolyte membrane is joined with the supporting base. In this connection, when a side of the ion conductive polymer electrolyte membrane having a smaller contact angle with water is assumed as the first side and another side thereof having a larger contact angle with water is assumed as the second side, the difference of the contact angles with water between the first side and the second side is more than 30°. The method for producing a laminate is characterized by comprising a step for preparing a polymer electrolyte solution by dissolving a polymer electrolyte into a solvent, which polymer electrolyte contains an ion conductive polymer having an aromatic group in the main chain and/or a side chain and an ion-exchange group directly bonded or indirectly bonded through another atom or atomic group to the aromatic group; and another step for forming a polymer electrolyte film on a supporting base by flow-casting and applying the polymer electrolyte solution over the supporting base.