ガス拡散電極を製造するためのスクリーン印刷法およびスクリーン印刷ペースト

Japanese Patent JP4792160

B2

A screen-printing paste as a starting material for fabricating a gas diffusion electrode through screen-printing includes at least one polymer, at least one metallic catalyst, and a high-boiling solvent. The polymer is a binder including poly(butyl acrylate)-polymethacrylate copolymer, a poly(vinyl alcohol), and a poly(ethylene oxide). The polymer can be two polymers, a first being used for hydrophobicization and present in an amount of between 0 to 10% by weight based on a content of the metallic-catalyst, and a second being a binder. A screen-printing method of fabricating the electrode for a fuel cell includes forming a screen-printing layer having a thickness between 3 and 40 mum by applying the screen-printing paste to a base. The solvent and the polymer serve as a screen-printing medium. The screen-printing layer is baked to allow only residues of the solvent and the polymer to remain, which do not interfere with using the electrode in a fuel cell. The method uses a polybutylacrylate-polymethacrylate copolymer as a binder in the screen-printing paste.

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Darts, aluminum
Shricker, barbara
Weithas, Manfred
Otic, peter
Schaffrad, Vinfried

JP2000571098A

October 12, 2011

August 20, 1999

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Siemens Aktiengesellschaft

B41M1/12; H01M4/88; H01M4/86; H01M4/90; H01M4/92; H01M8/1004

JP9180728A
JP8124583A
JP10064574A
JP7105955A

Iwao Yamaguchi
Hiroshi Yamamoto

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