Method for producing catalyst electrode for direct methanol fuel cell, method for producing membrane electrode assembly for direct methanol fuel cell, and method for producing direct methanol fuel cell

摘要

PPROBLEM TO BE SOLVED: To provide a method of manufacturing a catalytic electrode having an effect of improving in an output when applied to a solid polymer electrolyte fuel cell, etc., and to provide a method of manufacturing a membrane electrode junction (MEA) and a method of manufacturing an electrochemical device. PSOLUTION: After a mixture of platinum supporting carbon particulate, etc., a hydrogen ion conductive resin such as Nafion (R), etc. and a solvent such as an alcohol, are applied to conductive porous materials 1, 5 such as carbon paper, etc. having water repellence, the solvent is evaporated at 60-80C in the atmosphere, and catalyst layers 3, 7 are formed. Then, the catalyst layers 3, 7 are heated at the temperature of 100-140C and the pressure of 210Pa or more in the atmosphere in which an oxygen below oxygen partial pressure or less exists for 0.2-6 hours, and heat treated oxygen pole catalyst layer 3a and fuel electrode catalyst layer 7a are manufactured. Then, a hydrogen ion conduction film 9 is held between the oxygen pole 4 and the fuel pole 8, heated at 100-150C, press bonded, and the MEA 10 is manufactured. PCOPYRIGHT: (C)2005,JPO&NCIPI