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:
Feb. 15, 2022
Filed:
Dec. 18, 2019
Applicant:
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 14/00 (2006.01); H01M 10/26 (2006.01); H01M 10/42 (2006.01); H01M 4/66 (2006.01); H01M 4/485 (2010.01); H01M 4/24 (2006.01); H01M 4/48 (2010.01); H01M 50/20 (2021.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 10/26 (2013.01); H01M 4/24 (2013.01); H01M 4/48 (2013.01); H01M 4/485 (2013.01); H01M 4/661 (2013.01); H01M 10/425 (2013.01); H01M 50/20 (2021.01); H01M 2004/027 (2013.01); H01M 2010/4271 (2013.01); H01M 2300/0014 (2013.01);
Abstract
A secondary battery includes a positive electrode, a negative electrode and an electrolyte containing aqueous electrolyte. The negative electrode is provided with a negative electrode current collector having a compound including aluminum, and a negative electrode active material including titanium on a granule surface of the negative electrode current collector. A ratio of an atomic concentration of aluminum atoms to sum of atomic concentrations of aluminum atoms and titanium atoms on a surface of the negative electrode ({Al atomic concentration/(Al atomic concentration+Ti atomic concentration)}×100) is 3 atm % or more and 30 atm % or less.