US 12,080,882 B2
Cathode active material for lithium secondary battery, and lithium secondary battery comprising cathode including cathode active material
Donggyu Chang, Yongin-si (KR); and Jongmin Kim, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si Gyeonggi-do (KR)
Filed on Oct. 5, 2021, as Appl. No. 17/494,686.
Application 17/494,686 is a division of application No. 16/412,185, filed on May 14, 2019, granted, now 11,152,610.
Claims priority of application No. 10-2018-0055658 (KR), filed on May 15, 2018.
Prior Publication US 2022/0029154 A1, Jan. 27, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/628 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A cathode active material for a lithium secondary battery, comprising:
a secondary particle of a nickel-based active material, wherein the secondary particle comprises an aggregate of two or more primary particles,
wherein the secondary particle comprises a radial arrangement structure in which the primary particles are aligned such that a (003) plane of each of the primary particles is perpendicular to an outermost plane of the secondary particle,
50% or more of the primary particles are arranged to have the radial arrangement structure, and
a lithium fluoride-based compound is present on a surface of the secondary particle,
wherein a pore size of an inner portion of the secondary particle is about 200 nm to about 1 μm, and a pore size of an outer portion is less than 100 nm.