US 11,876,157 B2
Positive electrolyte active material for secondary battery, preparation method thereof, and lithium secondary battery including same
Won Tae Kim, Daejeon (KR); Jong Yeol Yu, Daejeon (KR); Seoung Chul Ha, Daejeon (KR); and Sun Sik Shin, Daejeon (KR)
Assigned to LG Chem, Ltd.
Appl. No. 17/274,330
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Sep. 30, 2019, PCT No. PCT/KR2019/012712
§ 371(c)(1), (2) Date Mar. 8, 2021,
PCT Pub. No. WO2020/067830, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 10-2018-0115731 (KR), filed on Sep. 28, 2018.
Prior Publication US 2021/0328213 A1, Oct. 21, 2021
Int. Cl. H01M 4/36 (2006.01); C01G 53/00 (2006.01); H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [C01G 53/44 (2013.01); H01M 4/0471 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2002/52 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for preparing a positive electrode active material for a secondary battery, comprising:
preparing a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn) wherein a content of the nickel (Ni) in a total content of the transition metal is 60 mol % or greater; and
dry mixing and heat treating the lithium composite transition metal oxide, MgF2 as a fluorine (F) coating source, and a boron (B) coating source to form a coating portion on the particle surface of the lithium composite transition metal oxide.