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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 11677075 B1

PDFFull Text
Date of Patent:
Jun. 13, 2023

Filed:

Dec. 26, 2018

Cathode active material for lithium ion secondary battery, method for manufacturing cathode active material for lithium ion secondary battery, and lithium ion secondary

Applicant:

Proterial, Ltd., Tokyo, JP;

Inventors:

Shuichi Takano, Tokyo, JP;

Akira Gunji, Tokyo, JP;

Hisato Tokoro, Tokyo, JP;

Genei Nakajima, Tokyo, JP;

Tatsuya Toyama, Tokyo, JP;

Shin Takahashi, Tokyo, JP;

Assignee:

PROTERIAL, LTD., Tokyo, JP;

Attorney:

Volpe Koenig

Primary Examiner:

Jonathan G Jelsma

Assistant Examiner:

Omar M Kekia

Int. Cl.
CPC ...
H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/505 (2010.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01); H01M 4/131 (2010.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 4/525 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01G 53/42 (2013.01); C01P 2002/52 (2013.01); C01P 2002/54 (2013.01); C01P 2004/03 (2013.01); C01P 2004/45 (2013.01); C01P 2004/50 (2013.01); C01P 2004/51 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01); C01P 2006/40 (2013.01); H01M 4/131 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); Y02E 60/10 (2013.01);
Abstract

Provided is a cathode active material for a lithium ion secondary battery in which the secondary particles constituting the powder have a high breaking strength and a good coatability, and a method for manufacturing same. The cathode active material for a lithium ion secondary battery includes a primary particle of a lithium composite compound; and secondary particles formed by an aggregation of primary particles, wherein a ratio between an average particle size of the primary particles and an average particle size of the secondary particles is 0.006 or more and 0.25 or less, an amount of lithium carbonate is 0.4% by mass or less, and a breaking strength of the secondary particles is 30 MPa or more.

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