US 12,136,714 B2
Method for selectively extracting lithium from retired battery and application of method
Bo Li, Guangdong (CN); Changdong Li, Guangdong (CN); Dingshan Ruan, Guangdong (CN); Ruokui Chen, Guangdong (CN); Yanchao Qiao, Guangdong (CN); and Donglian Bao, Guangdong (CN)
Assigned to 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)
Appl. No. 18/260,236
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)
PCT Filed Jun. 6, 2022, PCT No. PCT/CN2022/097178
§ 371(c)(1), (2) Date Jun. 30, 2023,
PCT Pub. No. WO2023/000843, PCT Pub. Date Jan. 26, 2023.
Claims priority of application No. 202110831643.0 (CN), filed on Jul. 22, 2021.
Prior Publication US 2024/0039068 A1, Feb. 1, 2024
Int. Cl. H01M 10/54 (2006.01); C22B 1/02 (2006.01); C22B 1/24 (2006.01); C22B 7/00 (2006.01); C22B 26/12 (2006.01)
CPC H01M 10/54 (2013.01) [C22B 1/02 (2013.01); C22B 1/24 (2013.01); C22B 7/007 (2013.01); C22B 26/12 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for selectively extracting lithium from a retired battery, consisting essentially of the following steps:
S1: mixing a lithium battery positive electrode material and a manganous salt, adding a solvent to prepare a slurry, and ball milling the slurry to obtain a ball milled mixed material; wherein the lithium battery positive electrode material is at least one of lithium manganate, lithium cobaltate, lithium nickel cobalt manganate or lithium nickel cobalt aluminate battery positive electrode materials; and, the manganous salt is at least one of manganous sulfate, manganous chloride, manganous nitrate, manganous phosphate, manganous acetate, manganous oxalate, or manganous acetylacetonate;
S2: calcining the ball milled mixed material to obtain a calcined product; and
S3: adding the calcined product into a leaching agent for leaching to obtain a lithium-rich leaching solution; wherein the leaching agent is at least one of water, carbonic acid solution, sulfuric acid solution, hydrochloric acid solution, or sodium hydroxide solution,
wherein in step S1, the solvent is water; and the positive electrode material has a layered structure.