US 12,428,312 B2
Preparation method of Ni-Rich ternary precursor and use thereof
Weiquan Li, Guangdong (CN); Changdong Li, Guangdong (CN); Genghao Liu, Guangdong (CN); Dingshan Ruan, Guangdong (CN); and Hongjia Lin, Guangdong (CN)
Assigned to GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Foshan (CN); HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., Changsha (CN); and HUNAN BRUNP EV RECYCLING CO., LTD., Changsha (CN)
Filed by GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Guangdong (CN); HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., Hunan (CN); and HUNAN BRUNP EV RECYCLING CO., LTD., Hunan (CN)
Filed on Sep. 28, 2023, as Appl. No. 18/374,003.
Application 18/374,003 is a continuation of application No. PCT/CN2021/142502, filed on Dec. 29, 2021.
Claims priority of application No. 202110354586.1 (CN), filed on Apr. 1, 2021.
Prior Publication US 2024/0025763 A1, Jan. 25, 2024
Int. Cl. C01G 53/50 (2025.01); H01M 4/505 (2010.01)
CPC C01G 53/50 (2013.01) [H01M 4/505 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2006/90 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A preparation method of a Ni-Rich ternary precursor, comprising the following steps:
S1: preparing a nickel salt, a cobalt salt, and a manganese salt into a metal salt solution;
S2: in an inert atmosphere, heating and feeding ammonia water, feeding an alkali liquor to adjust a pH, and feeding the alkali liquor and the metal salt solution simultaneously for a precipitation reaction to obtain particles with D50 of 7.0 μm to 15.0 μm;
S3: continuously feeding a seed crystal, and after D10 of the particles is adjusted to 2.0 μm to 7.0 μm, stopping feeding the seed crystal; continuously feeding the alkali liquor and the metal salt solution, and collecting an overflow material; and when a particle size grows to D50 of 7.0 μm to 15.0 μm once again, repeating an operation of feeding the seed crystal, and continuously collecting an overflow material; and
S4: washing, drying, and sieving all of the overflow materials collected in step S3 to obtain the Ni-Rich ternary precursor;
in S2, the pH is adjusted to 11.0 to 13.0, after the pH is adjusted, the seed crystal is first added, and then the alkali liquor and the metal salt solution are simultaneously fed for the precipitation reaction; and the seed crystal has a particle size of 2.0 μm to 7.0 μm;
in S4, the Ni-Rich ternary precursor has a particle size D10 of 2.0 μm to 5.0 μm, a particle size D50 of 7.0 μm to 15.0 μm, and a particle size D90 of 12.0 μm to 20.0 μm; and the Ni-Rich ternary precursor has a tap density of 2.12 g/cm3 to 2.15 g/cm3.