US 12,218,345 B2
High-nickel electrode sheet and method for manufacturing same
Song Yi Han, Daejeon (KR); and Ji Hoon Ryu, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/631,266
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Apr. 20, 2021, PCT No. PCT/KR2021/004953
§ 371(c)(1), (2) Date Jan. 28, 2022,
PCT Pub. No. WO2021/225303, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 10-2020-0054232 (KR), filed on May 7, 2020; and application No. 10-2021-0045784 (KR), filed on Apr. 8, 2021.
Prior Publication US 2022/0328808 A1, Oct. 13, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01); H01M 4/131 (2010.01); H01M 10/052 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 4/131 (2013.01); H01M 10/052 (2013.01); Y02E 60/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electrode sheet including a positive electrode mixture layer including a non-coated part and a coated part, and disposed on at least one surface of a current collector,
wherein the coated part includes:
a first positive electrode mixture layer disposed on a central portion along a longitudinal direction of the electrode sheet and containing a first positive electrode active material including lithium-nickel-cobalt-manganese oxide; and
a second positive electrode mixture layer disposed adjacent to one or two sides of the first positive electrode mixture layer in the longitudinal direction and containing a second positive electrode active material having a nickel content lower than a nickel content of the first positive electrode active material,
wherein a rolling density (b) of the second positive electrode mixture layer is smaller than a rolling density (a) of the first positive electrode mixture layer.