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:
May. 03, 2022
Filed:
Mar. 09, 2017
Applicant:
Nec Corporation, Tokyo, JP;
Inventor:
Takeshi Azami, Tokyo, JP;
Assignee:
NEC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 10/0525 (2010.01); H01M 4/587 (2010.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/134 (2010.01); H01M 4/133 (2010.01); H01M 4/38 (2006.01); H01M 10/0585 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 10/0525 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/587 (2013.01); H01M 10/0585 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01); Y02E 60/10 (2013.01); Y02T 10/70 (2013.01);
Abstract
Provided is a lithium ion secondary battery that has excellent cycle characteristics and employs a silicon material for a negative electrode. This lithium ion secondary battery is characterized by having a negative electrode comprising a plate-like artificial graphite and a material comprising silicon as a constituent element, wherein at least some of particles of the plate-like artificial graphite are bent and have a crease on a plate face.