US 12,136,732 B2
Cathode active material for lithium secondary battery, and lithium secondary battery comprising same
Sang Cheol Nam, Seoul (KR); Jung Hoon Song, Seoul (KR); and Kwon Young Choi, Seoul (KR)
Assigned to POSCO HOLDINGS INC., Seoul (KR); RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR); and POSCO CHEMICAL CO., LTD., Pohang-si (KR)
Appl. No. 17/298,298
Filed by POSCO, Pohang-si (KR); RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR); and POSCO CHEMICAL CO., LTD., Pohang-si (KR)
PCT Filed Nov. 29, 2019, PCT No. PCT/KR2019/016790
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/111893, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 10-2018-0152147 (KR), filed on Nov. 30, 2018; and application No. 10-2019-0157312 (KR), filed on Nov. 29, 2019.
Prior Publication US 2022/0093920 A1, Mar. 24, 2022
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/74 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A positive active material for a lithium secondary battery comprises lithium, nickel, cobalt, manganese, and a doping element,
wherein the doping element includes Zr, Al, and Ti,
wherein the positive active material for the lithium secondary battery is represented by Chemical Formula 1 below:
Lia1[Nix1Coy1Mnz1]t1(Zrh1Alg1Tiu1)O2-pX1p  [Chemical Formula 1]
in Chemical Formula 1,
X1 is at least one element selected from a group including F, N, and P,
a1 is 0.8≤a1≤1.3,
t1 is 0.9580<t1<0.9915, and
0.6≤x1≤0.95, 0<y1≤0.2, 0<z1≤0.2, 0.0010≤h1≤0.005, 0.007≤g1≤0.033, 0.0005≤ul≤0.004, and 0≤p≤0.02.