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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 11967706 B1

PDFFull Text
Date of Patent:
Apr. 23, 2024

Filed:

Sep. 18, 2022

Composite metal oxide material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack and electrical device

Applicant:

Contemporary Amperex Technology Co., Limited, Ningde, CN;

Inventors:

Bangrun Wang, Ningde, CN;

Zhenguo Zhang, Ningde, CN;

Chongheng Shen, Ningde, CN;

Na Liu, Ningde, CN;

Assignee:

CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde, CN;

Attorney:

Kilpatrick Townsend & Stockton LLP

Primary Examiner:

Maria Laios

Assistant Examiner:

Angela J Martin

Int. Cl.
CPC ...
H01M 4/36 (2006.01); C01G 49/00 (2006.01); C01G 51/00 (2006.01); C01G 53/00 (2006.01); H01M 4/04 (2006.01); H01M 4/48 (2010.01); H01M 4/485 (2010.01); H01M 4/50 (2010.01); H01M 4/505 (2010.01); H01M 4/52 (2010.01); H01M 4/525 (2010.01); H01M 10/05 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01G 49/0027 (2013.01); C01G 49/0045 (2013.01); C01G 49/0072 (2013.01); C01G 51/42 (2013.01); C01G 53/42 (2013.01); H01M 4/0471 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2002/50 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2004/84 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract

A composite metal oxide material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack and an electrical device are provided. The composite metal oxide material includes a central core and a coating layer on the surface of the central core, in which the central core material has a chemical formula of LiFeMO, 0.6≤x≤1; the coating layer material has a chemical formula of LiMO, M is one or more metal elements with +3 valence, and the absolute value of the difference between the +3-valence ion radius of Fe and the +3-valence ion radius of M is ≤0.02 nm. The composite metal oxide material of the present disclosure makes the secondary battery have high charge capacity, high discharge capacity and long cycle life.

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