Patent ID: 9325023
Filing Date: 2016-04-26
CPC Classification: B32B,H01M,Y02E,Y02P

Claim Text:
1. A manufacturing method for producing a membrane-electrode assembly for a polymer electrolyte fuel cell, the method comprising the steps of: (1) applying a catalyst slurry to a release film, said catalyst slurry composed of a mixture of a catalyst, a hydrogen ion conductive polymer and a dispersion medium, and drying the applied catalyst slurry, thereby forming a catalyst layer; (2) laminating the catalyst formed on the release film on both sides of an electrolyte membrane in such a manner that the catalyst layer faces the electrolyte membrane, wherein the electrolyte membrane is a polymer film made by a hydrocarbon polymer selected from the group consisting of sulfonated polysulfone, sulfonated polyethersulfone, sulfonated poly ether ketone, sulfonated poly ether ether ketone, sulfonated poly arylene ether ether ketone, sulfonated poly arylene ether sulfone, sulfonated poly arylene ether benzimidazole and partially fluorinated ion conductor, and wherein the electrolyte membrane is coated by hydrophilic solvent with an amount of 100-1000 mg of solvent per cm (3) hot-pressing the laminate to transfer the catalyst layer to the electrolyte membrane.