US 12,334,554 B2
Positive electrode active material for lithium rechargeable battery, method of producing the same, and lithium rechargeable battery including the same
Chi Ho Jo, Daejeon (KR); Hyuck Hur, Daejeon (KR); Seul Ki Kim, Daejeon (KR); Wang Mo Jung, Daejeon (KR); and Gi Beom Han, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Apr. 13, 2022, as Appl. No. 17/719,536.
Application 17/719,536 is a continuation of application No. 16/549,545, filed on Aug. 23, 2019, granted, now 11,342,557.
Claims priority of application No. 10-2018-0099115 (KR), filed on Aug. 24, 2018.
Prior Publication US 2022/0246929 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/46 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/366 (2013.01); H01M 4/46 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A positive electrode active material for a lithium rechargeable battery, comprising: a core particle comprising lithium cobalt oxide doped with aluminum (Al); and
a coating layer on a surface of the core particle, wherein the coating layer comprises a cobalt-based compound having a rock salt crystal structure,
wherein: the core particle comprises: a first region in which a crystal structure of the lithium cobalt oxide doped with Al is a layered structure; and a second region in which a crystal structure of the lithium cobalt oxide doped with Al is a spinel structure, and
wherein the cobalt-based compound having the rock salt crystal structure is cobalt(II) oxide.