US 11,862,790 B1
Lithium secondary battery
Ji Hyung Kim, Daejeon (KR); Young Ha Kim, Daejeon (KR); Sang Bin Lee, Daejeon (KR); and Ho Jin Hwang, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK ON CO., LTD., Seoul (KR)
Filed on Jun. 15, 2023, as Appl. No. 18/335,604.
Claims priority of application No. 10-2022-0078846 (KR), filed on Jun. 28, 2022.
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A lithium secondary battery, comprising:
a cathode comprising a cathode current collector and a cathode active material layer formed on the cathode current collector; and
an anode comprising an anode current collector and an anode active material layer formed on the anode current collector, the anode active material layer having an area larger than that of the cathode active material layer,
wherein the cathode active material layer comprises a central portion and an outer portion surrounding the central portion, and the outer portion has a specific capacity less than that of the central portion.