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:
Sep. 24, 2019
Filed:
Sep. 11, 2014
Applicant:
Sanyo Electric Co., Ltd., Daito-shi, Osaka, JP;
Inventors:
Assignee:
SANYO Electric Co., Ltd., Daito-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 10/052 (2010.01); H01M 4/02 (2006.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); H01M 4/48 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/052 (2013.01); H01M 2004/027 (2013.01);
Abstract
In a nonaqueous electrolyte secondary battery containing SiOas a negative electrode active material, initial charge/discharge efficiency and cycle characteristics are increased. A negative electrode active material for nonaqueous electrolyte secondary batteries is provided. The negative electrode active material contains particles comprising of SiOx (0.8≤X≤1.2). The particles have cracks therein. SiOpreferably contains a lithium silicate phase, a Si-M compound, or an oxide of M (M is at least one selected from the group consisting of Al, Ti, Fe, and Ni). The cracks preferably extend radially from inner portions of the particles.