US 11,721,807 B2
Nickel-based active material precursor for lithium secondary battery, preparation method thereof, nickel-based active material for lithium secondary battery formed therefrom, and lithium secondary battery including cathode including the nickel-based active material
Doyu Kim, Yongin-si (KR); and Wooyoung Yang, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Aug. 13, 2019, as Appl. No. 16/539,768.
Claims priority of application No. 10-2018-0094866 (KR), filed on Aug. 14, 2018; and application No. 10-2019-0097644 (KR), filed on Aug. 9, 2019.
Prior Publication US 2020/0058937 A1, Feb. 20, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); H01M 4/505 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A nickel-based active material precursor for a lithium secondary battery comprising:
a secondary particle comprising a plurality of particulate structures, each particulate structure having a radial center,
wherein the secondary particle comprises a plurality of radial centers,
wherein each particulate structure comprises a plurality of primary particles,
wherein each of the particulate structures comprises a porous core portion and a shell portion comprising primary particles radially arranged on the porous core portion, and
wherein, in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle,
wherein a porosity in the porous core portion are larger than the porosity in the shell portion.