MANUFACTURING METHOD FOR GAS DIFFUSING LAYER OF MEMBRANE-ELECTRODE JUNCTION BODY, MEMBRANE-ELECTRODE JUNCTION BODY, AND FUEL CELL

Title:

MANUFACTURING METHOD FOR GAS DIFFUSING LAYER OF MEMBRANE-ELECTRODE JUNCTION BODY, MEMBRANE-ELECTRODE JUNCTION BODY, AND FUEL CELL

Document Type and Number:

Japanese Patent JP2004273387

Kind Code:

A

Abstract:

To provide a manufacturing method for a gas diffusing layer showing water repellent after forming paste in to a film, although the paste is hydrophilic.

In this manufacturing method for the gas diffusing layer of a membrane-electrode junction body, the gas diffusing layer of the membrane-electrode junction body is formed by laminating a proton exchange membrane, an electrode catalyst layer, and the gas diffusing layer, and the method includes a process to apply a hydrophilization treatment to powder, a process to make paste by mixing the hydrophilized powder with a high polymer electrolyte and a solvent, and a process to form the paste into the film on a base material sheet, and a process to apply a water repellent treatment to the surface of the paste formed into the film.

Inventors:

MOGI KAZUNARI

Application Number:

JP2003066236A

Publication Date:

September 30, 2004

Filing Date:

March 12, 2003

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

H01M4/88; H01M4/86; H01M8/02; H01M8/10; (IPC1-7): H01M4/88; H01M4/86; H01M8/02; H01M8/10

Domestic Patent References:

JP2002063909A	2002-02-28
JPH09245800A	1997-09-19
JP2001110432A	2001-04-20

Attorney, Agent or Firm:

Yusuke Hiraki
Toshiaki Watanabe
Tsuruhiko Sekiguchi

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