METHOD FOR PRODUCING GAS DIFFUSION ELECTRODE SUBSTRATE, AND FUEL CELL

WIPO Patent Application WO/2018/186293

A1

The present invention provides a method for efficiently producing a gas diffusion electrode substrate having excellent adhesion. This method for producing a gas diffusion electrode substrate having a microporous layer on at least one surface of a conductive porous substrate comprises: a coating step for coating the conductive porous substrate with a coating solution including conductive particles, a water repellent material, a dispersion medium, and a surfactant; a drying step for heating at a temperature lower than the heating temperature of a first heat treatment step; the first heat treatment step for heating at a temperature lower than the melting point of the water repellent material; and a second heat treatment step for heating at a temperature equal to or higher than the melting point of the water repellent material, wherein the coating solution includes 0.09-0.27 parts by mass of the water repellent material with respect to 1 part by mass of the conductive particles, the heating time in the first heat treatment step is 0.2 to 3.0 minutes, and the heating time in the second heat treatment step is 2.9 minutes or less.

SODE KATSUYA (JP)
WAKATABE MICHIO (JP)
IWASAKI YUSUKE (JP)

PCT/JP2018/013610

October 11, 2018

March 30, 2018

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TORAY INDUSTRIES (JP)

H01M4/88; H01M8/10

JP2011258395A	2011-12-22
JP2015185217A	2015-10-22
JP2005100679A	2005-04-14
JP2003017071A	2003-01-17
JP2012226844A	2012-11-15
JP2014011108A	2014-01-20
JP2016225271A	2016-12-28
JP2015185217A	2015-10-22

See also references of EP 3609005A4

SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)

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