Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY, METHOD FOR PREPARING SAME AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2018/143753
Kind Code:
A1
Abstract:
The present invention relates to a positive electrode active material for a secondary battery. Lithium transition metal oxide comprises two or more transition metals selected from a group consisting of nickel (Ni), cobalt (Co) and manganese (Mn). 60 mol% or higher of nickel (Ni) is contained in the total transition metals contained in the lithium transition metal oxide. At least one of nickel (Ni), cobalt (Co) and manganese (Mn) contained in the lithium transition metal oxide has a concentration gradient in which the difference in concentration between the center and the particle surface of lithium transition metal oxide particles is 2 atom% or higher. The lithium transition metal oxide contains one or more doping elements selected from a group consisting of W, Mo, Ta, Nb, La and Bi. 2,000ppm or higher of the doping elements are contained.
Inventors:
CHOI SANG SOON (KR)
CHO SEUNG BEOM (KR)
JUN IN KOOK (KR)
JUNG WON SIG (KR)
CHO SEUNG BEOM (KR)
JUN IN KOOK (KR)
JUNG WON SIG (KR)
Application Number:
PCT/KR2018/001520
Publication Date:
August 09, 2018
Filing Date:
February 05, 2018
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M4/525; C01G53/00; H01M4/131; H01M4/36; H01M4/485; H01M4/505; H01M10/052
Foreign References:
| KR20160149162A | 2016-12-27 | |||
| KR20120079802A | 2012-07-13 | |||
| KR20160040118A | 2016-04-12 | |||
| KR20160068687A | 2016-06-15 | |||
| US20160181611A1 | 2016-06-23 |
Attorney, Agent or Firm:
BAE, KIM & LEE IP GROUP (KR)
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