Title:
CATHODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/092906
Kind Code:
A1
Abstract:
The present invention relates to a cathode active material preparation method and a cathode active material, the method comprising: a first step of mixing a cathode active material precursor and a lithium-containing material, and then firing same to prepare a fired product; a second step of using a washing solution, which comprises a coating layer precursor containing a chelate anion, so as to wash the fired product, and then drying same to prepare a lithium transition metal oxide in which a coating layer comprising a lithium chelate compound is formed; and a third step of preparing a lithium transition metal oxide, in which a coating layer comprising a Li-M-O solid solution (M is at least one selected from Nb, Co, Ti, V, Zr, Si, Al and Mo) is formed, by heat treating the lithium transition metal oxide in which a coating layer comprising a lithium chelate compound is formed, wherein the chelate anion comprises at least one metal selected from Nb, Co, Ti, V, Zr, Si, Al and Mo, and at least one ligand selected from an oxalate, a nitrite, a carboxylate, a borate, a phosphate and an acetate.
Inventors:
SEO YOU KYONG (KR)
GU YE HYEON (KR)
SHIM JONG HYUN (KR)
JEONG JIN HOO (KR)
GU YE HYEON (KR)
SHIM JONG HYUN (KR)
JEONG JIN HOO (KR)
Application Number:
PCT/KR2021/015465
Publication Date:
May 05, 2022
Filing Date:
October 29, 2021
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C01G53/00; C01G53/04; H01M4/36; H01M4/505; H01M4/525; H01M4/62
Foreign References:
| KR101980103B1 | 2019-05-21 | |||
| KR20190117049A | 2019-10-16 | |||
| JP2008277307A | 2008-11-13 | |||
| KR20140120752A | 2014-10-14 | |||
| KR100277796B1 | 2001-02-01 |
Other References:
See also references of EP 4174026A4
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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