US 12,252,414 B2
Method for preparing ternary cathode precursor material with low sulfur content and high specific surface area
Zhenqi Fang, Guangdong (CN); Changdong Li, Guangdong (CN); Genghao Liu, Guangdong (CN); Dingshan Ruan, Guangdong (CN); and Qianqian Shi, Guangdong (CN)
Assigned to GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Guangdong (CN); and HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., Hunan (CN)
Appl. No. 18/558,156
Filed by GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Guangdong (CN); and HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., Guangdong (CN)
PCT Filed Sep. 22, 2022, PCT No. PCT/CN2022/120617
§ 371(c)(1), (2) Date Oct. 30, 2023,
PCT Pub. No. WO2024/011751, PCT Pub. Date Jan. 18, 2024.
Claims priority of application No. 202210829321.7 (CN), filed on Jul. 14, 2022.
Prior Publication US 2024/0327239 A1, Oct. 3, 2024
Int. Cl. C01G 53/44 (2025.01)
CPC C01G 53/44 (2013.01) [C01P 2004/03 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for preparing a ternary cathode precursor material, comprising the following steps:
S1. mixing a soluble salt solution of mixed metals of nickel, cobalt and manganese, an alkali liquor and a complexing agent, and stirring a resulting mixture in a reaction kettle;
S2. concentrating a reacted material in the reaction kettle using a continuous filter with a spraying device, which comprises removing a mother liquor in the reacted material by negative pressure suction filtration to form a filter cake, then spraying a hot alkali liquor to the filter cake by means of the spraying device, contacting the filter cake with oxygen, and finally scrapping the filter cake off; and returning a resulting material to the reaction kettle for further growth; and
S3. after the material grows to a particle size of 10 μm to 15 μm, stopping feeding, and subjecting a resulting material to aging, washing with water, drying, screening and demagnetization to obtain the ternary cathode precursor material.