公开(公告)号：EP3890075A1

公开(公告)日：2021-10-06

申请号：EP19891357.6

申请日：2019-11-12

申请人： POSCO ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

发明人： PARK, Jong Il ,  LEE, Jae Myung ,  HWANGBO, Geun ,  NAM, Sang Cheol

IPC分类号： H01M4/62 ,  H01M4/13 ,  H01M10/052 ,  C01G51/00

摘要： The present invention relates to a positive electrode additive for a lithium secondary battery, a manufacturing method thereof, a positive electrode for a lithium secondary battery including the same, and a lithium secondary battery including the same.
The positive electrode additive for a lithium secondary battery according to an exemplary embodiment of the present invention is represented by Chemical Formula 1 below.

        [Chemical Formula 1]     Li 6x Co 1-y M y O 4


(In the Chemical Formula 1, 0.9≤x≤1.1, 0 a W b , 0≤a≤0.1, 0≤b≤0.1, and, a and b are not simultaneously 0.)
Another positive electrode additive for a lithium secondary battery according to an exemplary embodiment of the present invention includes a core represented by Chemical Formula 2 below; and a coating layer comprising at least one of boron (B) and tungsten (W).

        [Chemical Formula 2]     L1 6x CoO 4


(In the Chemical Formula 2, 0.9≤x≤1.1.)

公开(公告)号：EP3878814A1

公开(公告)日：2021-09-15

申请号：EP19882477.3

申请日：2019-10-11

申请人： POSCO ,  Research Institute of Industrial Science & Technology

发明人： LEE, Jae Myung ,  AHN, Jun-Kyu ,  KIM, Sang Won ,  YANG, Heok

IPC分类号： C01D15/02 ,  C01G53/00 ,  H01M4/525 ,  H01M10/0525

摘要： The present invention relates to a lithium compound, a nickel-based cathode active material, a method for preparing lithium oxide, a method for preparing a nickel-based cathode active material, and a secondary battery using same. The lithium compound includes primary particles of Li 2 O having an average particle diameter (D50) of less than or equal to 5 µm; and secondary particles composed of the primary particles.

公开(公告)号：EP3553855A1

公开(公告)日：2019-10-16

申请号：EP17881416.6

申请日：2017-12-07

申请人： POSCO ,  Research Institute of Industrial Science & Technology

发明人： NAM, Sang Cheol ,  LEE, Jae Won ,  PARK, Jong Il ,  LEE, Jae Myung ,  PARK, Geun Gyung

IPC分类号： H01M4/485 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525

摘要： A positive electrode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium transition metal composite oxide and doping metals doped in the lithium-transition metal composite oxide, wherein the doping metals includes at least two kinds and the average oxidation number of the doping metals is greater than 3.5.