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.:
Date of Patent:
Jun. 26, 2018
Filed:
Nov. 26, 2010
Applicant:
Hiroshi Onizuka, Toyota-shi, JP;
Inventor:
Hiroshi Onizuka, Toyota-shi, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/13 (2010.01); H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/133 (2013.01); H01M 4/366 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); Y02T 10/7011 (2013.01); Y10T 29/49115 (2015.01);
Abstract
The present invention provides a negative electrode active material which can prevent reduction in battery capacity by suppressing reaction of an electrolyte solution at the surface of the negative electrode active material as well as can reduce resistance resulting from the formation of a film. A negative electrode active materialfor a lithium ion secondary battery comprises a carbon materialcapable of reversibly storing and releasing lithium, an amorphous carbon membranecoating the surface of the carbon material and a filmcontaining a phosphate compound and coating the surface of the amorphous carbon membrane.