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:
Dec. 10, 2019
Filed:
Apr. 02, 2013
Applicant:
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/38 (2006.01); H01M 4/134 (2010.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 4/386 (2013.01); H01M 4/134 (2013.01); H01M 4/38 (2013.01); H01M 4/622 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2300/0017 (2013.01);
Abstract
Provided is a novel negative electrode for nonaqueous electrolyte secondary batteries, which is capable of improving cycle characteristics and is also capable of suppressing aggregation of active material particles in a slurry. The negative electrode active material for nonaqueous electrolyte secondary batteries contains silicon and has a D50 of 0.1 μm to 5 μm, and an amount of water measured at 120° C. to 300° C. by the Karl-Fischer method (referred to as 'amount of water') per specific surface area (referred to as 'CS'), that is, the amount of water/CS, of 0.1 to 80 ppm/(m/cc).