US 12,080,879 B1
Lithium secondary battery
Seung Won Park, Daejeon (KR); Yo Han Kwon, Daejeon (KR); Je Young Kim, Daejeon (KR); Seok Koo Kim, Daejeon (KR); Wang Mo Jung, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); and Byung Chun Park, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/697,933
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Oct. 5, 2022, PCT No. PCT/KR2022/015011
§ 371(c)(1), (2) Date Apr. 2, 2024,
PCT Pub. No. WO2023/059074, PCT Pub. Date Apr. 13, 2023.
Claims priority of application No. 10-2021-0131947 (KR), filed on Oct. 5, 2021; and application No. 10-2022-0127247 (KR), filed on Oct. 5, 2022.
Int. Cl. H01M 4/36 (2006.01); H01M 4/133 (2010.01); H01M 4/48 (2010.01); H01M 4/505 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/133 (2013.01); H01M 4/366 (2013.01); H01M 4/483 (2013.01); H01M 4/505 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A lithium secondary battery comprising:
a negative electrode;
a positive electrode;
a separator disposed between the negative electrode and the positive electrode; and
an electrolyte,
wherein the negative electrode includes SiOx, where 0<x<2, and a carbon-based negative electrode active material,
the positive electrode includes, as a positive electrode active material, a lithium-rich manganese-based oxide in which a manganese content in a total metal content except lithium is greater than 50 mol % and a ratio (Li/Me) of a number of moles of lithium to a total number of moles of metals except lithium is greater than 1, and
a depth of using SiOx defined by Equation (1) below in a state of SOC 0% is 1 to 15:
Depth of using SiOx=(capacity of residual Li in negative electrode/capacity of SiOx in negative electrode)×100.  Equation (1).