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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 10243215 B1

PDFFull Text
Date of Patent:
Mar. 26, 2019

Filed:

Mar. 21, 2016

Positive electrode active material including lithium transition metal particles with graphene coating layer positive electrode and lithium ion secondary battery including the same

Applicant:

Tdk Corporation, Tokyo, JP;

Inventors:

Junpei Shitaba, Tokyo, JP;

Hideaki Seki, Tokyo, JP;

Hiroyuki Miyabara, Tokyo, JP;

Assignee:

TDK CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Sean P Cullen

Int. Cl.
CPC ...
H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 4/131 (2010.01); H01M 4/136 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/625 (2013.01); H01M 4/131 (2013.01); H01M 4/136 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract

A positive electrode active material for lithium ion secondary battery includes: active material particles including one or more compounds including Li and a transition metal; and a coating layer coating at least a part of a surface of the active material particles. The coating layer includes at least one of graphene or multilayer graphene The coating layer has a Raman spectrum with a G band (a peak of 1530 cmto 1630 cm), a D band (a peak of 1300 cmto 1400 cm), and a 2D band (a peak of 2650 cmto 2750 cm). At least the intensity of the 2D band normalized by the intensity of the G band (2D/G) satisfies 0.05≤2D/G.

Find Patent Forward Citations

Shitaba, Junpei. (2019). Positive electrode active material including lithium transition metal particles with graphene coating layer positive electrode and lithium ion secondary battery including the same (U.S. Patent No. 10243215). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10243215

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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