	US 12,255,317 B2
	Positive electrode active material for secondary battery, method of preparing the same, and lithium secondary battery including the positive electrode active material
Dong Joon Ahn, Daejeon (KR); Jung Ho Lim, Daejeon (KR); and Yeo June Yoon, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/601,526
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Apr. 10, 2020, PCT No. PCT/KR2020/004936 § 371(c)(1), (2) Date Oct. 5, 2021, PCT Pub. No. WO2020/209685, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 10-2019-0042155 (KR), filed on Apr. 10, 2019.
Prior Publication US 2022/0199981 A1, Jun. 23, 2022
Int. Cl. H01M 4/36 (2006.01); C01G 53/50 (2025.01); C09D 5/24 (2006.01); C09D 7/61 (2018.01); C09D 127/16 (2006.01); C09D 133/26 (2006.01); C09D 179/08 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); C08K 3/22 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)

CPC H01M 4/366 (2013.01) [C01G 53/50 (2013.01); C09D 5/24 (2013.01); C09D 7/61 (2018.01); C09D 127/16 (2013.01); C09D 133/26 (2013.01); C09D 179/08 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); C01P 2002/50 (2013.01); C01P 2006/40 (2013.01); C08K 2003/2293 (2013.01); C08K 2201/001 (2013.01); H01M 2004/028 (2013.01); H01M 10/0525 (2013.01)]

13 Claims

1. A positive electrode active material for a secondary battery, the positive electrode active material comprising a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide comprises 60 mol % or more of the nickel (Ni) among metals excluding lithium, and

a coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein the coating layer comprises a lithium-polymer compound which is formed by a reaction of a lithium by-product with a polymer,

wherein the lithium by-product comprises at least one selected from the group consisting of LiOH and Li₂CO₃.