US 12,261,263 B2
Lithium secondary battery
Byung Chun Park, Daejeon (KR); Yo Han Kwon, Daejeon (KR); Je Young Kim, Daejeon (KR); Seok Koo Kim, Daejeon (KR); Wang Mo Jung, Daejeon (KR); Yong Ju Lee, Daejeon (KR); and Chul Haeng Lee, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/276,557
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Jul. 21, 2022, PCT No. PCT/KR2022/010679
§ 371(c)(1), (2) Date Aug. 9, 2023,
PCT Pub. No. WO2023/003378, PCT Pub. Date Jan. 26, 2023.
Claims priority of application No. 10-2021-0095985 (KR), filed on Jul. 21, 2021; and application No. 10-2022-0089894 (KR), filed on Jul. 20, 2022.
Prior Publication US 2024/0047731 A1, Feb. 8, 2024
Int. Cl. H01M 10/0525 (2010.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01)
CPC H01M 10/0525 (2013.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/623 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A lithium secondary battery comprising a positive electrode, a negative electrode, a separator, and an electrolyte,
wherein the positive electrode comprises a positive electrode active material layer comprising a positive electrode active material comprising an overlithiated manganese-based oxide represented by Formula 1 below, and
the negative electrode comprises a negative electrode active material layer comprising a silicon-based negative electrode active material,
LiaNibCocMndMeO2  [Formula 1]
wherein, 1<a, 0≤b≤0.5, 0≤c≤0.08, 0.5≤d<1.0, and 0≤e≤0.2, and M is at least one selected from the group consisting of Al, B, Co, W, Mg, V, Ti, Zn, Ga, In, Ru, Nb, Sn, Sr, and Zr,
wherein the positive electrode has an electrode density of 2.5 g/cc to 3.8 g/cc.