US 11,699,784 B2
Cathode active material for lithium secondary battery and method of manufacturing the same
Jik Soo Kim, Daejeon (KR); Sang Bok Kim, Daejeon (KR); Hyo Shin Kwak, Daejeon (KR); Myoung Lae Kim, Daejeon (KR); Se Rah Moon, Daejeon (KR); Jin Seok Seo, Daejeon (KR); Mi Jung Noh, Daejeon (KR); and Duck Chul Hwang, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR)
Filed on Nov. 5, 2019, as Appl. No. 16/674,864.
Claims priority of application No. 10-2018-0135346 (KR), filed on Nov. 6, 2018; and application No. 10-2019-0125433 (KR), filed on Oct. 10, 2019.
Prior Publication US 2020/0144612 A1, May 7, 2020
Int. Cl. H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/62 (2006.01); C07D 295/14 (2006.01); C07D 277/36 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [C07D 277/36 (2013.01); C07D 295/14 (2013.01); H01M 4/525 (2013.01); H01M 4/628 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cathode active material for a lithium secondary battery, comprising:
a lithium metal oxide particle; and
a thio-based compound formed on at least portion of a surface of the lithium metal oxide particle, the thio-based compound including a thioamide compound represented by Structural Formula 1,
wherein the thio-based compound forms a coating layer, a ligand bond or a complex bond on the surface of the lithium metal oxide particle:

OG Complex Work Unit Chemistry
wherein, in the Structural Formula 1 above, R1 represents hydrogen, halogen, a salt containing O−or S−, a C1-C10 hydrocarbon group capable of substituted with a substituent group, a C1-C10 alkoxy group, an amine group, an amine group substituted with a C1-C10 alkyl group, a C1-C10 thioalkyl group or a thioamide group,
wherein R2 and R3 are each independently hydrogen or a C1-C10 hydrocarbon group capable of substituted with a substituent group, R2 and R3 are capable of being fused together to form a ring, and
wherein the substituent group capable of being combined with R1, R2 and R3 includes halogen, a cyano group, a hydroxyl group or a carboxyl group.