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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 10164249 B1

PDFFull Text
Date of Patent:
Dec. 25, 2018

Filed:

Aug. 20, 2015

Positive active material for secondary lithium battery, method for preparing the same and secondary lithium battery containing the positive active material

Applicant:

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

Inventors:

Xiangpeng Fang, Fujian, CN;

Chengren Wu, Fujian, CN;

Na Liu, Fujian, CN;

Xuguang Gao, Fujian, CN;

Assignee:

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

Attorney:
Primary Examiner:

Rena Dye Cronin

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/131 (2010.01); H01M 4/525 (2010.01); C01G 51/00 (2006.01); C01G 53/00 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01G 51/42 (2013.01); C01G 51/66 (2013.01); C01G 53/42 (2013.01); C01G 53/50 (2013.01); C01G 53/66 (2013.01); H01M 4/131 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2004/84 (2013.01); C01P 2006/40 (2013.01);
Abstract

The present invention provides a positive active material for use in a secondary lithium battery, a method for preparing the positive active material and a secondary lithium battery containing the positive active material. The positive active material includes a core of lithium transition metal oxide represented by Formula LiMNOAand a coating layer of lithium transition metal silicate represented by Formula x'LiO.y′N′O.SiOBwhich in-situ formed on the core, wherein 0.8≤x≤1.3, 0.6≤y≤1.0, 0.01≤x′≤2.1, 0.2≤y′≤1.5, 0.1≤a≤3.0, 0≤α≤0.2, 0≤β≤0.4, 0≤λ≤0.5, 0≤ζ≤0.5. The positive active material according to the present invention has high capacity, desirable cycling performance and safety performance, as well as desirable thermal stability.

Find Patent Forward Citations

Fang, Xiangpeng. (2018). Positive active material for secondary lithium battery, method for preparing the same and secondary lithium battery containing the positive active material (U.S. Patent No. 10164249). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10164249

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