Title:
WASTE TERNARY POSITIVE ELECTRODE MATERIAL RECLAIMING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/060547
Kind Code:
A1
Abstract:
Disclosed in the present invention is a waste ternary positive electrode material reclaiming method. The method comprises the following steps: (1) mixing a waste ternary positive electrode material with an acid for activation; (2) mixing the activated positive electrode material with a lithium source solution, carrying out lithium replenishing under the conditions of pressurizing and heating, and annealing in an inert atmosphere the lithium-replenished positive electrode material; (3) mixing the annealed positive electrode material, a nickel source, a cobalt source, a manganese source, a fluoride and water to obtain a mixture, then carrying out spray granulation to obtain an NCM precursor, and calcining the NCM precursor in the presence of oxygen to obtain a calcined material; and (4) using porous graphene loaded with coating particles to carry out liquid-phase pre-coating on the calcined material, and calcining the obtained pre-coated material in the presence of oxygen to obtain a coated ternary positive electrode material. The present invention effectively improves the purity, the structure stability and the electrochemical performance of reclaimed ternary positive electrode materials by means of annealing, doping, gradient calcination and coating.
Inventors:
LI AIXIA (CN)
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI CHANGDONG (CN)
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2023/082858
Publication Date:
March 28, 2024
Filing Date:
March 21, 2023
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
International Classes:
H01M10/54; H01M4/36; H01M4/505; H01M10/0525
Domestic Patent References:
| WO2017096525A1 | 2017-06-15 |
Foreign References:
| CN115498298A | 2022-12-20 | |||
| CN111129487A | 2020-05-08 | |||
| CN113636605A | 2021-11-12 | |||
| CN114853061A | 2022-08-05 | |||
| CN108615869A | 2018-10-02 | |||
| CN111009645A | 2020-04-14 | |||
| CN113120971A | 2021-07-16 | |||
| CN113745493A | 2021-12-03 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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