Title:
IMPURITY REMOVAL AND TREATMENT METHOD IN RECOVERY PROCESS OF SCRAPPED POSITIVE ELECTRODE MATERIAL OF LITHIUM BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/111266
Kind Code:
A1
Abstract:
Provided is an impurity removal and treatment method in a recovery process of a scrapped positive electrode material of a lithium battery: comprising: at a first temperature higher than a room temperature and a fixed first pH value, controlling flow rates of a scrapped positive electrode material leaching solution of the lithium battery and a first alkaline solution to precipitate and remove iron ions, aluminum ions, and at least some of copper ions to obtain a first filtrate; at a second temperature higher than the room temperature and a fixed first pH range, controlling flow rates of the first filtrate, a complexing agent, and a second alkaline solution to separate out a second filtrate containing lithium ions to obtain a target substance precipitate; dissolving the target substance precipitate to obtain a first solution; and at a third temperature higher than the room temperature and a fixed fluorine ion concentration, controlling flow rates of the first solution and a fluorine-containing precipitant to precipitate and remove calcium ions, magnesium ions, and at least some of lead ions to obtain a target solution. The precipitate having a large particle size, high crystallinity, and low water content can be obtained, washing is convenient, and the recovery rate of scrapped positive electrode material nickel-cobalt-manganese of the lithium battery is increased.
Inventors:
JUNG JOEY CHUNG-YEN (CN)
ZHANG JIUJUN (CN)
DAI LINSHAN (CN)
SUI PANG-CHIEH (CN)
SHI YIFANG (CN)
ZHANG JIUJUN (CN)
DAI LINSHAN (CN)
SUI PANG-CHIEH (CN)
SHI YIFANG (CN)
Application Number:
PCT/CN2021/129320
Publication Date:
June 02, 2022
Filing Date:
November 08, 2021
Export Citation:
Assignee:
SICHUAN ENERGY INT RES INST TSINGHUA UNIV (CN)
International Classes:
H01M10/54; C22B7/00
Foreign References:
| CN112151903A | 2020-12-29 | |||
| CN111041217A | 2020-04-21 | |||
| CN109439907A | 2019-03-08 | |||
| CN111392750A | 2020-07-10 | |||
| CN109837392A | 2019-06-04 | |||
| CN111092273A | 2020-05-01 | |||
| US20190123402A1 | 2019-04-25 |
Attorney, Agent or Firm:
METIS IP (CHENGDU) LLC (CN)
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