POLYMER ELECTROLYTE MEMBRANE, LAMINATE THEREOF, AND THEIR PRODUCTION METHODS

摘要

An object of the present invention is to provide a method for producing a laminate wherein an ion conductive polymer electrolyte membrane is laminated on a supporting substrate in a state where any one surface of the polymer electrolyte membrane is bonded to the supporting substrate, a difference in a contact angle against water between one surface and the other surface of the ion conductive polymer electrolyte membrane being 30° or less, the method comprising the steps of:
preparing a polymer electrolyte solution in which a polymer electrolyte containing an ion conductive polymer having an aromatic group in the main chain and/or the side chain, and also having an ion exchange group bonded directly to the aromatic group or bonded indirectly to the aromatic group via the other atom or atomic group is dissolved in a solvent; and
applying the polymer electrolyte solution on the supporting substrate by flow casting thereby laminating the polymer electrolyte membrane on the supporting substrate.