Title:
METHOD FOR PREPARING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND CATHODE ACTIVE MATERIAL PREPARED BY PREPARATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/015511
Kind Code:
A1
Abstract:
The present invention relates to: a method for preparing a cathode active material; a cathode active material prepared by the preparation method; and a cathode for a lithium secondary battery and a lithium secondary battery, which comprise the cathode active material, the method comprising the steps of: forming a first coating layer on the surface of a lithium transition metal oxide, represented by chemical formula 1, by using a basic aqueous solution containing a coating element M1 (M1 comprises at least one selected from Na and Al); and forming a second coating layer by dry mixing and heat treating the lithium transition metal oxide, having the first coating layer formed thereon, and a material containing a coating element M2 (M2 comprises B).
Inventors:
EOM JUN HO (KR)
AHN DONG JOON (KR)
LIM CHAE JIN (KR)
KIM JI HYE (KR)
JUNG BYOUNG HUN (KR)
AHN DONG JOON (KR)
LIM CHAE JIN (KR)
KIM JI HYE (KR)
JUNG BYOUNG HUN (KR)
Application Number:
PCT/KR2020/009520
Publication Date:
January 28, 2021
Filing Date:
July 20, 2020
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M4/36; C01B35/12; C01F7/00; C01G53/00; H01M4/505; H01M4/525; H01M4/62; H01M10/052
Foreign References:
| KR20170103662A | 2017-09-13 | |||
| JP5092292B2 | 2012-12-05 | |||
| KR101892612B1 | 2018-08-28 | |||
| KR20180087102A | 2018-08-01 | |||
| KR20150014892A | 2015-02-09 |
Other References:
See also references of EP 3951940A4
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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