US 12,451,481 B2
Method of producing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery produced thereby
No Woo Kwak, Daejeon (KR); Hyuck Lee, Daejeon (KR); Duck Gyun Mok, Daejeon (KR); and Min Hee Son, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/606,268
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Nov. 27, 2020, PCT No. PCT/KR2020/017079
§ 371(c)(1), (2) Date Oct. 25, 2021,
PCT Pub. No. WO2021/107684, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10-2019-0155170 (KR), filed on Nov. 28, 2019.
Prior Publication US 2022/0216463 A1, Jul. 7, 2022
Int. Cl. H01M 4/36 (2006.01); C01G 53/50 (2025.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2004/03 (2013.01); C01P 2004/82 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A positive electrode active material comprising:
a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated,
wherein a zirconium-containing coating film is formed on a surface of the secondary particle and at an interface between the primary particles present inside the secondary particle,
wherein an amount of zirconium applied inside the secondary particle of the lithium transition metal oxide with respect to a total amount of zirconium applied on the lithium transition metal oxide is 1 atm % to 50 atm %, and
wherein at least one element selected from the group consisting of Bi and Sb is included inside the secondary particle.