	US 12,017,918 B2
	Production method of a carbon sheet
Tomoko Yamagishi, Tokyo (JP); and Mitsugu Uejima, Tokyo (JP)
Assigned to ZEON CORPORATION, Tokyo (JP)
Filed by ZEON CORPORATION, Tokyo (JP)
Filed on Apr. 20, 2023, as Appl. No. 18/303,567.
Application 18/303,567 is a continuation of application No. 17/653,674, filed on Mar. 7, 2022.
Application 17/653,674 is a continuation of application No. 16/647,872, granted, now 11,305,996, issued on Apr. 19, 2022, previously published as PCT/JP2018/036117, filed on Sep. 27, 2018.
Claims priority of application No. 2017-189154 (JP), filed on Sep. 28, 2017.
Prior Publication US 2023/0271835 A1, Aug. 31, 2023
Int. Cl. C01B 32/159 (2017.01)

CPC C01B 32/159 (2017.08) [C01P 2006/12 (2013.01)]

7 Claims

1. A production method of a carbon sheet comprising: a porous substrate made from carbon; and one or more carbon nanotubes, attached to the porous substrate, and having a porosity of not less than 5% and not more than 90%,

wherein the production method comprises:

a dispersion liquid impregnation step of impregnating a porous substrate made from carbon with a dispersion liquid containing carbon nanotubes and a solvent, to obtain a dispersion liquid-impregnated porous substrate; and

a solvent removal step of removing the solvent from the dispersion liquid-impregnated porous substrate.