MANUFACTURING METHOD AND MANUFACTURING DEVICE FOR MEMBRANE ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELL, AND POLYMER ELECTROLYTE FUEL CELL

摘要

[Problem] It is to provide methods and apparatuses for manufacturing, in low cost and high efficiency, a membrane electrode assembly for polymer electrolyte fuel cells without using films and the like as sub materials; the membrane electrode assembly has an electrolyte membrane on each side of which a target-shaped electrode catalyst layer with a high uniformity in membrane thickness is mounted with a low interface resistance. [Solving means] Coating of catalyst ink is applied to a surface of a transfer roll 11 using a coating-solution supplying means 12 to form a catalyst layer. The catalyst ink contains at least proton-conducting polymer and a carbon-supported catalyst. The catalyst layer formed on the transfer roll 11 is pressed on an excess coating-solution removing roll 13 having a recess while the catalyst layer is in semi-dry state to transfer and remove an excess catalyst layer from the transfer roll 11 to a protrusion of the excess coating-solution removing roll 13. The recess has a same shape or a substantially same shape as a target pattern. A semi-dry catalyst layer having a target shape and remaining on the transfer roll 11 is pressed on a polymer electrolyte membrane 4 to bring the semi-dry catalyst layer into intimate contact with a surface of the polymer electrolyte membrane 4. The polymer electrolyte membrane 4 having each side on which the semi-dry catalyst layer has been formed is dried.