To provide an MEA manufacturing method without unevenness in dimension and shape of catalyst layers, capable of doing away with problems on performance and mounting due to generation unevenness, and yet of high productivity.
The method includes a first process I of continuously coating catalyst 12 on a strip electrolyte film 11 conveyed in one direction, a second process II of jointing gas diffusion layers 15 with intervals on a catalyst layer 14 coated with the catalyst 12, a third process III of cutting the electrolyte film 11 already coated with the catalyst 12 at a fixed position between adjacent gas diffusion layers 15, and a fourth process IV of immersing an end part each with the catalyst layer 14 exposed of the cut and separated electrolyte film 11 having the gas diffusion layer 15 already coated with the catalyst jointed on the catalyst layer 14 in catalyst removal liquid 16 capable of removing the catalyst layer 14 from the electrolyte film 11. After the catalyst 12 is continuously coating the catalyst 12 on the strip electrolyte film 11, the catalyst layer 14 at the end part of an MEA element body 19 is removed so as to make the dimension and shape of the catalyst layers 14 uniform.
COPYRIGHT: (C)2010,JPO&INPIT
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Miyazaki Yoshio
Kaoru Onozuka
Akio Tagami
High Masahiro