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:
Aug. 04, 2026
Filed:
Aug. 29, 2023
Sumitomo Chemical Company, Limited, Tokyo, JP;
Kyoto University, Kyoto, JP;
Marie Takiguchi Takemoto, Osaka, JP;
Satoshi Shimano, Kyoto, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Kyoto University, Tokyo, JP;
Abstract
A method for producing a positive electrode active material, includes the steps of (1) bringing an electrode mixture containing a positive electrode active material, a binder, and an electrolyte into contact with an electrolyte cleaning solvent to obtain a slurry containing a solid component and a liquid component, and then separating the slurry into the solid component and the liquid component, wherein an amount of P in the liquid component after separation is 0.0020 to 2.0 mass %, an amount of F in the liquid component after separation is 0.01 to 7.0 mass %, and an amount of P remaining in the solid component after separation is 0.7 mass % or less; (2) mixing an activation treatment agent with the separated solid component; and (3) heating a mixture obtained to activate the positive electrode active material contained in the mixture.