CARBON SHEET, METHOD FOR MANUFACTURING SAME, GAS DIFFUSION ELECTRODE, AND FUEL CELL

WIPO Patent Application WO/2022/210008

A1

The present invention provides a carbon sheet favorably used in a gas diffusion electrode, it being possible to prevent said electrode from bending into a gas flow path worked into a separator without degrading electrical resistance in the plane-perpendicular direction.　This carbon sheet, with which the purpose described above is achieved, has a first surface and a second surface positioned on the opposite side to the first surface, wherein: when a specific section is divided into 20 equal parts in the thickness direction to create 20 layers, the degree of fiber orientation of the outermost surface layer on the first-surface side is 1.20–3.00 inclusive; and, taking an area of said layer composed of a continuous layer satisfying a specific condition to be a first-surface-side area and an area of said layer that is not included in the first-surface-side area to be a second-surface-side area, the thickness of the first-surface-side area is 40% or less of the thickness of the entire carbon sheet, and the difference between the average degree of fiber orientation in the second-surface-side area and the degree of fiber orientation in the outermost surface layer of on the first-surface side is greater than 0.10.

WATANABE TADATAKA (JP)
SODE KATSUYA (JP)
KAMEDA SHUNSUKE (JP)
WAKATABE MICHIO (JP)

PCT/JP2022/012511

October 06, 2022

March 18, 2022

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TORAY INDUSTRIES (JP)

D21H13/50; D04H1/4242; H01M4/96

US20170301923A1	2017-10-19
KR20160120060A	2016-10-17
JP2018026343A	2018-02-15
JP2011198520A	2011-10-06
JP2013191435A	2013-09-26
JP2006222024A	2006-08-24
US20170301923A1	2017-10-19
JP2013191435A	2013-09-26
KR20160120060A	2016-10-17

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