Patent ID: 10224561

Abstract:
A technique for producing a membrane electrode assembly with high quality is provided. In a method for producing a membrane electrode assembly, a first catalyst layer of a first catalyst layer sheet is bonded to a surface of an electrolyte film on which an electrolyte film base sheet is not formed. A first catalyst layer base sheet is separated from the first catalyst layer. The electrolyte film base sheet has been separated from the electrolyte film. A second catalyst layer of a second catalyst layer sheet is bonded to a surface of the electrolyte film from which the electrolyte film base sheet has been separated. The method for producing a membrane electrode assembly further includes a preliminary step of bonding either the second catalyst layer formed on the second catalyst layer base sheet or the second catalyst layer base sheet to a portion of the electrolyte film that has been fed prior to a position at which bonding of the first catalyst layer starts.