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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 10862119 B1

PDFFull Text
Date of Patent:
Dec. 08, 2020

Filed:

Nov. 15, 2018

Cathode active material and manufacturing method thereof

Applicant:

Ecopro Bm Co., Ltd., Cheongju-si, KR;

Inventors:

Moon Ho Choi, Cheongju-si, KR;

Jong Hwan Park, Cheongju-si, KR;

Gyeong Jae Heo, Cheongju-si, KR;

Hyun Jong Yu, Cheongju-si, KR;

Kyoung Jun Lee, Cheongju-si, KR;

Jung Bae Park, Cheongju-si, KR;

Seung Hyun Choi, Cheongju-si, KR;

Assignee:

ECOPRO BM CO., LTD., Cheongju-si, KR;

Attorney:

Saliwanchik, Lloyd & Eisenschenk

Primary Examiner:

Christopher P Domone

Assistant Examiner:

Kimberly Wyluda

Int. Cl.
CPC ...
H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/36 (2006.01); C01G 45/12 (2006.01); C01G 53/00 (2006.01); C01G 53/04 (2006.01); C01G 45/02 (2006.01); H01M 4/02 (2006.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 4/505 (2013.01); C01G 45/02 (2013.01); C01G 45/1242 (2013.01); C01G 45/1257 (2013.01); C01G 53/04 (2013.01); C01G 53/42 (2013.01); H01M 4/362 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2002/54 (2013.01); C01P 2002/72 (2013.01); C01P 2002/85 (2013.01); C01P 2004/50 (2013.01); C01P 2004/82 (2013.01); H01M 10/052 (2013.01); H01M 2004/028 (2013.01);
Abstract

The present invention relates to a cathode active material for a secondary battery and a preparation method thereof, and more particularly, to a lithium composite oxide including a secondary particle formed as primary particles cohere, in which a manganese (Mn) oxide is present in the periphery of the primary particles, a concentration of an Mn oxide in the primary particle has a concentration gradient from the center of the primary particle to a surface of the particle, a concentration of an Mn oxide in the secondary particle has a concentration gradient from a surface of the secondary particle to the center thereof, and a lithium ion migration path is formed in the primary particle, and a preparation method thereof. A secondary battery including the cathode active material for a secondary battery may have high safety, while exhibiting high capacity and high output.

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