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:
Feb. 07, 2020
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Panasonic Corporation, Kadoma, JP;
Tomoko Iwanaga, Ehime, JP;
Hideo Sasaoka, Ehime, JP;
Satoshi Matsumoto, Ehime, JP;
Yutaka Kawatate, Osaka, JP;
Shinji Arimoto, Osaka, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
PANASONIC CORPORATION, Osaka, JP;
Abstract
A method for manufacturing a positive electrode active material includes: (a) preparing a fired powder of a lithium nickel composite oxide by mixing a nickel compound selected from a nickel hydroxide including nickel, and an element selected from other transition metal elements, elements of the second group and elements of the thirteenth group of the Periodic System, a nickel oxyhydroxide thereof, and a nickel oxide obtained by roasting thereof, and a lithium compound, and firing the mixture at a maximum temperature of 650° C. to 850° C. under oxygen atmosphere; and (b) preparing a lithium nickel composite oxide powder by mixing the fired powder with water to obtain a slurry, washing the fired powder with water at a temperature of 10° C. to 40° C., while controlling an electrical conductivity of a liquid portion of the slurry to 30 mS/cm to 60 mS/cm, then filtering and drying the resultant fired powder.