Patent ID: 7169500

Claim:
A method for producing a membrane and electrode assembly (MEA) of a fuel cell, the method comprising the following steps: forming a composition for forming a catalyst layer by mixing composition components consisting essentially of a metal catalyst, a polymer ionomer, an alcohol solvent selected from the group consisting of isopropyl alcohol, methanol, and ethanol in an amount of 1.000 to 5.000 parts by weight based on 100 parts by weight of the metal catalyst, and a polar organic solvent having a boiling point of 30 to 200° C. in an amount of 50 to 500 parts by weight based on 100 parts by weight of the metal catalyst; coating the composition for forming a catalyst layer directly on both surfaces of a polymer electrolyte membrane followed by drying to form electrode catalyst layers; and assembling electrode supports on the electrode catalyst layers.