US 10,892,471 B2
Methods of preparing positive electrode active material precursor for lithium secondary battery and positive electrode active material
Sang Soon Choi, Daejeon (KR); Hyun Ah Park, Daejeon (KR); and Won Sig Jung, Daejeon (KR)
Assigned to LG Chem, Ltd.
Appl. No. 16/333,378
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Feb. 6, 2018, PCT No. PCT/KR2018/001607
§ 371(c)(1), (2) Date Mar. 14, 2019,
PCT Pub. No. WO2018/143783, PCT Pub. Date Aug. 9, 2018.
Claims priority of application No. 10-2017-0016346 (KR), filed on Feb. 6, 2017; and application No. 10-2018-0014230 (KR), filed on Feb. 5, 2018.
Prior Publication US 2019/0214628 A1, Jul. 11, 2019
Int. Cl. H01M 4/04 (2006.01); C01G 53/00 (2006.01); H01M 10/0525 (2010.01); H01M 4/505 (2010.01); H01M 4/02 (2006.01); H01M 4/525 (2010.01)
CPC H01M 4/0471 (2013.01) [C01G 53/00 (2013.01); C01G 53/006 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of preparing a positive electrode active material precursor for a lithium secondary battery by using a batch-type reactor, the method comprising:
(1) forming positive electrode active material precursor particles while continuously adding a transition metal-containing solution including a transition metal cation, an aqueous alkaline solution, and an ammonium ion-containing solution to the batch-type reactor;
(2) stopping the addition of the solutions when the batch-type reactor is full and sedimenting the positive electrode active material precursor particles formed;
(3) discharging a supernatant formed after the sedimentation of the positive electrode active material precursor particles to an outside;
(4) adjusting a pH, which has been reduced in the discharging of the supernatant, to 10 to 12 by adding the ammonium ion-containing solution; and
(5) growing the positive electrode active material precursor particles while continuously again adding the transition metal-containing solution including a transition metal cation, the aqueous alkaline solution, and the ammonium ion-containing solution to the batch-type reactor.