US 11,670,768 B2
Nickel-based active material precursor for lithium secondary battery, method of preparing the same, nickel-based active material for lithium secondary battery formed therefrom, and lithium secondary battery including positive electrode including nickel-based active material
Pilsang Yun, Yongin-si (KR); Jangsuk Hyun, 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 Jun. 25, 2019, as Appl. No. 16/452,282.
Claims priority of application No. 10-2018-0073588 (KR), filed on Jun. 26, 2018.
Prior Publication US 2019/0393502 A1, Dec. 26, 2019
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/006 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2004/50 (2013.01); H01M 2004/028 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A nickel-based active material precursor for a lithium secondary battery, the nickel-based active material precursor comprising:
a secondary particle comprising a plurality of particulate structures connected in a single structure, each particulate structure of the plurality of particulate structures having a radial center,
wherein each particulate structure is an agglomerate of a plurality of primary particles, and
wherein each particulate structure comprises a porous core portion and a shell portion, the shell portion comprising primary particles radially arranged on the porous core portion, and the porous core portion having a higher porosity than the shell portion.