US 12,334,553 B2
Cathode active material precursor, cathode active material, lithium secondary battery and method of manufacturing the same
Jik Soo Kim, Daejeon (KR); Ji Hoon Choi, Daejeon (KR); and Kook Hyun Han, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR)
Filed on Aug. 17, 2021, as Appl. No. 17/404,771.
Claims priority of application No. 10-2020-0103395 (KR), filed on Aug. 18, 2020.
Prior Publication US 2022/0059833 A1, Feb. 24, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/525 (2013.01) [H01M 4/0471 (2013.01); H01M 4/0497 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cathode active material precursor comprising a composite hydroxide particle in which primary precursor particles are aggregated, the composite hydroxide particle containing nickel, and a molar ratio of nickel in metals included in the composite hydroxide particle is in a range from 0.8 to 0.95,
wherein the primary precursor particles include a particle having a triangular shape in which a minimum interior angle is 30° or more and a ratio of a length of a short side relative to a length of a long side is 0.5 or more, and
wherein the composite hydroxide particle has a specific surface area of 0.89 m2/g or less.