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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 9017638 B1

PDFFull Text
Expired
Date of Patent:
Apr. 28, 2015

Filed:

Feb. 24, 2012

Graphene prepared by using edge functionalization of graphite

Applicants:

Jong Beom Baek, Ulsan, KR;

Eun Kyoung Choi, Chungbuk, KR;

IN Yup Jeon, Chungbuk, KR;

Seo Yun Bae, Gyeonggi-do, KR;

Inventors:

Jong Beom Baek, Ulsan, KR;

Eun Kyoung Choi, Chungbuk, KR;

In Yup Jeon, Chungbuk, KR;

Seo Yun Bae, Gyeonggi-do, KR;

Assignee:

Unist Academy-Industry Research Corp, , KR;

Attorneys:

Amy Allen Hinson

John B. Hardaway, III

Nexsen Pruet, LLC

Primary Examiner:

Daniel C McCracken

Int. Cl.
CPC ...
C01B 31/02 (2006.01); C07C 221/00 (2006.01); C07C 45/00 (2006.01); B82B 3/00 (2006.01); B82B 1/00 (2006.01); C01B 31/04 (2006.01); C01B 3/00 (2006.01); B82Y 40/00 (2011.01); B82Y 30/00 (2011.01);
U.S. Cl.
CPC ...
C01B 31/0469 (2013.01); C07C 221/00 (2013.01); C01B 3/0021 (2013.01); Y02E 60/325 (2013.01); B82Y 40/00 (2013.01); B82Y 30/00 (2013.01); Y10S 977/734 (2013.01); Y10S 977/847 (2013.01);
Abstract

Disclosed is a method for producing graphene functionalized at its edge positions of graphite. Organic material having one or more functional groups is reacted with graphite in reaction medium comprising methanesulfonic acid and phosphorus pentoxide, or in reaction medium comprising trifluoromethanesulfonic acid, to produce graphene having organic material fuctionalized at edges. And then, high purity and large scaled graphene and film can be obtained by dispersing, centrifugal separating the functionalized graphene in a solvent and reducing, in particular heat treating the graphene. According to the present invention graphene can be produced inexpensively in a large amount with a minimum loss of graphite. (FIG.)

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Baek, Jong. (2015). Graphene prepared by using edge functionalization of graphite (U.S. Patent No. 9017638). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9017638

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