US 12,327,869 B2
Positive electrode active material precursor for lithium secondary battery, and method of preparing the same
Seong Bae Kim, Daejeon (KR); Yi Rang Lim, Daejeon (KR); Kyoung Wan Park, Daejeon (KR); Hyun Uk Kim, Daejeon (KR); Hong Kyu Park, Daejeon (KR); Chang Jun Moon, Daejeon (KR); and Eun Hee Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Mar. 28, 2024, as Appl. No. 18/620,537.
Application 18/620,537 is a division of application No. 16/763,697, granted, now 11,973,222, previously published as PCT/KR2018/015570, filed on Dec. 7, 2018.
Claims priority of application No. 10-2017-0168709 (KR), filed on Dec. 8, 2017; and application No. 10-2018-0157347 (KR), filed on Dec. 7, 2018.
Prior Publication US 2024/0243279 A1, Jul. 18, 2024
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2025.01); C01G 53/40 (2025.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/525 (2013.01) [C01G 53/40 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of preparing a positive electrode active material precursor, the method comprising:
forming positive electrode active material precursor particles while adding a reaction solution including a transition metal-containing solution, an ammonium ion-containing solution, and a basic aqueous solution to a reactor with a filtration device installed therein; and
performing continuous concentration in which the reaction solution is added while continuously discharging a portion of the reaction solution in the reactor out of the reactor using the filtration device when the reactor is full,
wherein a concentration of a solid content in the reactor is increased at a constant rate.