US 12,304,834 B2
Positive electrode active material for lithium secondary battery and method for producing the same
Sung Chul Lim, Daejeon (KR); Min Chul Jang, Daejeon (KR); Il Hong Kim, Daejeon (KR); In Sung Uhm, Daejeon (KR); and Byoung Hyo Jung, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/773,983
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 12, 2020, PCT No. PCT/KR2020/015925
§ 371(c)(1), (2) Date May 3, 2022,
PCT Pub. No. WO2021/096265, PCT Pub. Date May 20, 2021.
Claims priority of application No. 10-2019-0145386 (KR), filed on Nov. 13, 2019.
Prior Publication US 2022/0363561 A1, Nov. 17, 2022
Int. Cl. C01G 53/42 (2025.01)
CPC C01G 53/42 (2013.01) [C01P 2002/32 (2013.01); C01P 2006/40 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A positive electrode active material comprising:
a lithium transition metal oxide having a spinel crystal structure; and
a coating layer positioned on a surface of the lithium transition metal oxide,
wherein the coating layer has an orthorhombic structure, and includes an oxide represented by Formula 1 below:
Li2+xNi1−yM1yO2+z  [Formula 1]
wherein in Formula 1 above, 0≤x≤0.2, 0<y≤0.5, and 0≤z≤0.2, and M1 includes one or more selected from the group consisting of Cu, Mg, Pt, Al, Co, P, and B, and wherein
the oxide represented by Formula 1 belongs to an Immm space group.