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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.:

US 12620589 B1

PDFFull Text
Date of Patent:
May. 05, 2026

Filed:

Jul. 27, 2022

Method for producing positive electrode active material for lithium secondary battery and method for producing positive electrode for lithium secondary battery

Applicant:

Sumitomo Metal Mining Co., Ltd., Tokyo, JP;

Inventors:

Masashi Inoue, Niihama, JP;

Yukako Aoyama, Niihama, JP;

Assignee:

SUMITOMO METAL MINING CO., LTD., Tokyo, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Mark Kopec

Int. Cl.
CPC ...
H01B 1/08 (2006.01); C01G 53/42 (2025.01); C01G 53/50 (2025.01); H01M 4/1391 (2010.01); H01M 4/525 (2010.01); H01M 10/42 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/525 (2013.01); C01G 53/42 (2013.01); C01G 53/50 (2013.01); H01B 1/08 (2013.01); H01M 4/1391 (2013.01); H01M 10/4235 (2013.01); C01P 2002/50 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01);
Abstract

A method for producing a positive electrode active material for a lithium secondary battery capable of reducing the amount of the lithium compound to be eluted and improving the cycle characteristic and the discharge rate characteristic of a lithium secondary battery is achieved. According to one embodiment of the present invention, a method for producing a positive electrode active material for a lithium secondary battery includes a step of mixing a powder P2 having a specific molar specific surface area and containing a sulfate and/or a phosphate of a specific metal with a powder P1 containing a lithium metal composite oxide.

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Inoue, Masashi. (2026). Method for producing positive electrode active material for lithium secondary battery and method for producing positive electrode for lithium secondary battery (U.S. Patent No. 12620589). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12620589

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