| US 7,455,888 B2 | ||
| Method and apparatus for forming catalyst layer on substrate constituting membrane electrode assembly | ||
| Satoshi Kadotani, Owariasahi (Japan); Tatsuya Kawahara, Toyota (Japan); Masashi Murate, Nagoya (Japan); and Yoshifumi Kaji, Okazaki (Japan) | ||
| Assigned to Toyota Jidosha Kabushiki Kaishi, Toyota-shi (Japan) | ||
| Appl. No. 10/588,150 PCT Filed Feb. 18, 2005, PCT No. PCT/JP2005/003079 § 371(c)(1), (2), (4) Date Aug. 01, 2006, PCT Pub. No. WO2005/080008, PCT Pub. Date Sep. 01, 2005. |
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| Claims priority of application No. 2004-042957 (JP), filed on Feb. 19, 2004. | ||
| Prior Publication US 2007/0129237 A1, Jun. 07, 2007 | ||
| Int. Cl. B05D 1/32 (2006.01) | ||
| U.S. Cl. 427—468 [427/469; 427/472; 427/58] | 5 Claims |
| 1. A method for forming a catalyst layer on a substrate constituting a membrane electrode assembly, whereby a catalyst layer
is formed by allowing electrode powder to disperse by electrostatic force and extruding force to the substrate, comprising:
providing a screen having a mesh facing a substrate in a state of non-contact;
disposing an elastic body in a state of contact with a surface of the screen to supply the electrode powder to the screen;
applying voltage between the screen and the substrate so as to electrically charge the electrode powder supplied to the screen
and to generate an electric field between the screen and the substrate in which the electrically charged electrode powder
moves;
pressing the electrode powder supplied to the screen by the elastic body towards the screen and deforming the elastic body
while being pressed against the screen to allow the elastic body to at least partly enter into the mesh of the screen so as
to exude the electrode powder through the mesh of the screen towards the substrate; and
dispersing the electrode powder towards the substrate so as to adhere thereto by the electrostatic force and the extruding
force of the elastic body.
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