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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 9614218 B1

PDFFull Text
Date of Patent:
Apr. 04, 2017

Filed:

Oct. 11, 2013

Composite carbon particle and lithium-ion secondary cell using same

Applicant:

Showa Denko K.k., Tokyo, JP;

Inventors:

Masataka Takeuchi, Tokyo, JP;

Yoshihito Yokoyama, Tokyo, JP;

Chiaki Sotowa, Tokyo, JP;

Assignee:

SHOWA DENKO K.K., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Patrick Ryan

Assistant Examiner:

Wyatt McConnell

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01M 10/0565 (2010.01); H01M 10/0569 (2010.01); H01M 4/04 (2006.01); H01M 4/133 (2010.01); H01M 4/1393 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); H01M 4/0402 (2013.01); H01M 4/0471 (2013.01); H01M 4/133 (2013.01); H01M 4/1393 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 10/0565 (2013.01); H01M 10/0569 (2013.01); H01M 2004/027 (2013.01); H01M 2300/0028 (2013.01); H01M 2300/0082 (2013.01); Y02P 70/54 (2015.11); Y02T 10/7011 (2013.01);
Abstract

A composite carbon particle for use in a negative electrode of a lithium-ion secondary battery, the composite carbon particle including a core particle composed of a carbon material obtained by heating, at not higher than 2500° C., petroleum coke having a Hardgrove grindability index (HGI value) of 30 to 60 (defined by ASTM D409), and a covering layer composed of a carbonaceous material obtained by heating an organic compound at 1000° C. to 2000° C. The composite carbon particle has a 50% particle diameter (D50) of 1 μm to 30 μm in a volume-based cumulative particle size distribution as measured by a laser diffraction method.

Find Patent Forward Citations

Takeuchi, Masataka. (2017). Composite carbon particle and lithium-ion secondary cell using same (U.S. Patent No. 9614218). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9614218

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