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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11898261 B1

PDFFull Text
Date of Patent:
Feb. 13, 2024

Filed:

Jan. 06, 2022

Method for manufacturing graphene-coated object, negative electrode of secondary battery including graphene-coated object, and secondary battery including the negative electrode

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;

Inventors:

Teppei Oguni, Kanagawa, JP;

Takeshi Osada, Kanagawa, JP;

Toshihiko Takeuchi, Kanagawa, JP;

Assignee:

Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;

Attorneys:

NIXON PEABODY LLP

Jeffrey L. Costellia

Primary Examiner:

Lingwen R Zeng

Int. Cl.
CPC ...
C25D 13/02 (2006.01); H01M 4/133 (2010.01); H01M 4/139 (2010.01); H01M 4/1393 (2010.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 10/0525 (2010.01); H01M 4/13 (2010.01); H01M 4/1395 (2010.01); C25D 13/22 (2006.01); H01M 4/02 (2006.01); B82Y 30/00 (2011.01);
U.S. Cl.
CPC ...
C25D 13/02 (2013.01); B82Y 30/00 (2013.01); C25D 13/22 (2013.01); H01M 4/0416 (2013.01); H01M 4/0452 (2013.01); H01M 4/13 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/139 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/366 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01);
Abstract

To form graphene to a practically even thickness on an object having an uneven surface or a complex surface, in particular, an object having a surface with a three-dimensional structure due to complex unevenness, or an object having a curved surface. The object and an electrode are immersed in a graphene oxide solution, and voltage is applied between the object and the electrode. At this time, the object serves as an anode. Graphene oxide is attracted to the anode because of being negatively charged, and deposited on the surface of the object to have a practically even thickness. A portion where graphene oxide is deposited is unlikely coated with another graphene oxide. Thus, deposited graphene oxide is reduced to graphene, whereby graphene can be formed to have a practically even thickness on an object having surface with complex unevenness.

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