	US 12,412,894 B2
	Method of preparing positive electrode active material
Min Hee Son, Daejeon (KR); Hyuck Lee, Daejeon (KR); Duck Gyun Mok, Daejeon (KR); No Woo Kwak, Daejeon (KR); and Dong Joon Ahn, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/800,087
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Apr. 15, 2021, PCT No. PCT/KR2021/004775 § 371(c)(1), (2) Date Aug. 16, 2022, PCT Pub. No. WO2021/210936, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 10-2020-0046965 (KR), filed on Apr. 17, 2020.
Prior Publication US 2023/0098542 A1, Mar. 30, 2023
Int. Cl. H01M 4/525 (2010.01); C01G 53/50 (2025.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01)

CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); C01P 2002/50 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)]

10 Claims

1. A method of preparing a positive electrode active material, comprising:

(A) preparing a lithium transition metal oxide; and

(B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying,

wherein the rinsing solution includes one or more additive of LiOH, NaOH, or KOH,

the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and

the rinsing solution has a pH of 12 or more.