US 12,255,312 B2
Lithium secondary battery
Jeong Woo Lee, Daejeon (KR); and Min Ji Heo, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/311,165
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Mar. 6, 2020, PCT No. PCT/KR2020/003199
§ 371(c)(1), (2) Date Jun. 4, 2021,
PCT Pub. No. WO2020/180160, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10-2019-0026395 (KR), filed on Mar. 7, 2019.
Prior Publication US 2022/0029152 A1, Jan. 27, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 10/42 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/621 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2010/4292 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lithium secondary battery comprising:
a positive electrode which includes a positive electrode active material layer including a lithium nickel cobalt manganese-based oxide and a lithium cobalt-based oxide;
a negative electrode which includes a negative electrode active material layer including a negative electrode active material; and
an electrolyte,
wherein an average particle diameter of primary particles of the lithium nickel cobalt manganese-based oxide is 3 μm or more,
a ratio of negative electrode capacity to positive electrode capacity is in a range of 1.06 to 1.15, and
wherein the positive electrode active material layer comprises the lithium nickel cobalt manganese-based oxide and the lithium cobalt-based oxide in a weight ratio of 50:50 to 80:20.