US 12,438,154 B2
Positive electrode active material for secondary battery, method for preparing same, and lithium secondary battery including the same
Won Tae Kim, Daejeon (KR); Jong Yeol Yu, Daejeon (KR); Hong Kyu Park, Daejeon (KR); Sun Sik Shin, Daejeon (KR); and Seong Hoon Kang, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Oct. 6, 2023, as Appl. No. 18/377,439.
Application 18/377,439 is a division of application No. 16/959,033, granted, now 11,831,014, previously published as PCT/KR2019/002165, filed on Feb. 21, 2019.
Prior Publication US 2024/0038987 A1, Feb. 1, 2024
Int. Cl. H01M 4/525 (2010.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for preparing a positive electrode active material for a secondary battery, comprising:
providing a lithium complex transition metal oxide which includes nickel (Ni), cobalt (Co), and at least one selected from the group consisting of manganese (Mn) and aluminum (Al), and has a nickel (Ni) content of 65 mol % or more with respect to a total transition metal content; and
forming a composite coating portion on a surface of the lithium complex transition metal oxide by dry mixing and heat treating the lithium complex transition metal oxide, a cobalt (Co) coating source, a boron (B) coating source, and a coating source including at least one selected from the group consisting of lanthanum (La), titanium (Ti), and aluminum (Al).