US 12,322,792 B2
Cathode for lithium secondary battery and lithium secondary battery including cathode
Su Ung Chae, Daejeon (KR); and Seung Ryul Choi, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Jun. 18, 2024, as Appl. No. 18/746,065.
Claims priority of application No. 10-2023-0082900 (KR), filed on Jun. 27, 2023.
Prior Publication US 2025/0006903 A1, Jan. 2, 2025
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/131 (2010.01); H01M 4/136 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/131 (2013.01); H01M 4/136 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A cathode comprising:
a current collector;
a first cathode mixture layer on at least one surface of the current collector; and
a second cathode mixture layer on the first cathode mixture layer,
wherein the first cathode mixture layer includes a first cathode active material having a layered crystal structure,
wherein the second cathode mixture layer includes the first active material and a second cathode active material having an olivine-based crystal structure,
wherein the first cathode mixture layer and the second cathode mixture layer have a thickness ratio of 1:9 to 4:6, and
wherein a content of the second cathode active material, included in a cathode mixture layer including the first cathode mixture layer and the second cathode mixture layer, is 50 wt % or more with respect to a total weight of a cathode active material including the first cathode active material and the second cathode active material.