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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 9508980 B1

PDFFull Text
Date of Patent:
Nov. 29, 2016

Filed:

Aug. 08, 2014

Graphite particles and lithium secondary battery using the same as negative

Applicant:

Hitachi Chemical Company, Ltd., Tokyo, JP;

Inventors:

Yoshito Ishii, Ibaraki, JP;

Tatsuya Nishida, Ibaraki, JP;

Atsushi Fujita, Ibaraki, JP;

Kazuo Yamada, Ibaraki, JP;

Assignee:

Hitachi Chemical Company, Ltd., Tokyo, JP;

Attorney:

Fitch, Even, Tabin & Flannery, LLP

Primary Examiner:

Laura Weiner

Int. Cl.
CPC ...
H01M 4/04 (2006.01); C01B 31/04 (2006.01); H01M 4/133 (2010.01); H01M 4/1393 (2010.01); H01M 4/583 (2010.01); H01M 4/587 (2010.01); H01M 10/052 (2010.01); H01M 10/0525 (2010.01); H01M 4/62 (2006.01); H01M 10/058 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/0404 (2013.01); C01B 31/04 (2013.01); H01M 4/0433 (2013.01); H01M 4/133 (2013.01); H01M 4/1393 (2013.01); H01M 4/583 (2013.01); H01M 4/587 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01); C01P 2002/60 (2013.01); C01P 2002/72 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); H01M 4/621 (2013.01); H01M 10/058 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11); Y02T 10/7011 (2013.01); Y10T 29/49115 (2015.01); Y10T 428/2982 (2015.01);
Abstract

A method for forming a negative electrode for a lithium secondary battery, includes providing a paste comprising graphite particulates comprise assembled or bound graphite particles in each of which a plurality of flat-shaped particles are assembled or bound together so that the planes of orientation are not parallel to one another, and the mixture including 3 to 10 parts by weight of the organic binder per 100 parts by weight of the graphite particulates, a binder and a solvent, coating the paste on a current collector, drying the paste coated on the current collector to form a mixture of the graphite particulates and the binder, and integrating the mixture with the current collector by pressing to provide a density of the mixture of graphite particulates and organic binder of 1.5 to 1.9 g/cm.

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