Title:
CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2022/119336
Kind Code:
A1
Abstract:
A cathode active material for a lithium secondary battery, according to an embodiment of the present invention, comprises a lithium composite oxide comprising a lithium-rich layered oxide, which is represented by the following chemical formula 1, wherein the lithium composite oxide comprises secondary particles, each of the secondary particles comprises one or more primary particles, each of the primary particles comprises one or more crystallites, at least any one selected from among the secondary particles, the primary particles and the crystallites comprises a core and a shell, which occupies a part of the surface of the core, and, when the mole of at least any one element selected from among nickel (Ni), cobalt (Co) and manganese (Mn) to the total mole of M1 and M2 in the following chemical formula 1 are NCM/M, the NCM/M of the shell and the core in the secondary particles are different from each other. [Chemical formula 1] rLi2M1O3·(1-r)LiaM2O2
Inventors:
CHOI MOON HO (KR)
CHOI SEUNG HYUN (KR)
LIM RA NA (KR)
YANG A REUM (KR)
CHOI SEUNG HYUN (KR)
LIM RA NA (KR)
YANG A REUM (KR)
Application Number:
PCT/KR2021/018083
Publication Date:
June 09, 2022
Filing Date:
December 02, 2021
Export Citation:
Assignee:
ECOPRO BM CO LTD (KR)
International Classes:
H01M4/525; C01G53/00; H01M4/36; H01M4/505; H01M10/052
Foreign References:
| KR20160149162A | 2016-12-27 | |||
| KR20190069367A | 2019-06-19 | |||
| KR20160032246A | 2016-03-23 |
Other References:
MAKHONINA E.V.; MASLENNIKOVA L.S.; VOLKOV V.V.; MEDVEDEVA A.E.; RUMYANTSEV A.M.; KOSHTYAL YU.M.; MAXIMOV M. YU.; PERVOV V.S.; EREM: "Li-rich and Ni-rich transition metal oxides: Coating and core-shell structures", APPLIED SURFACE SCIENCE, vol. 474, 26 July 2018 (2018-07-26), AMSTERDAM, NL , pages 25 - 33, XP085599048, ISSN: 0169-4332, DOI: 10.1016/j.apsusc.2018.07.159
PAN ZHEFEI; ZHUANG HERAN; BI YANDING; AN LIANG: "A direct ethylene glycol fuel cell stack as air-independent power sources for underwater and outer space applications", JOURNAL OF POWER SOURCES, vol. 437, 29 July 2019 (2019-07-29), AMSTERDAM, NL, XP085770287, ISSN: 0378-7753, DOI: 10.1016/j.jpowsour.2019.226944
PAN ZHEFEI; ZHUANG HERAN; BI YANDING; AN LIANG: "A direct ethylene glycol fuel cell stack as air-independent power sources for underwater and outer space applications", JOURNAL OF POWER SOURCES, vol. 437, 29 July 2019 (2019-07-29), AMSTERDAM, NL, XP085770287, ISSN: 0378-7753, DOI: 10.1016/j.jpowsour.2019.226944
Attorney, Agent or Firm:
WETHEPEOPLE IP & LAW FIRM (KR)
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