Method for synthesizing lithium nickel cobalt manganese oxide by using active substance separated from waste lithium power battery as raw material

A technology of nickel-cobalt lithium manganese oxide and power battery, which is applied in the field of synthesis of nickel-cobalt lithium manganese oxide, can solve the problems of low recovery and filtration, high energy consumption of active materials, and secondary pollution, so as to maintain integrity, accelerate the dissolution process, Good for secondary use

Inactive Publication Date: 2018-08-14
四川省有色冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing recovery and separation batteries have high energy consumption of active materials, low recovery and filtration, and will cause certain secondary pollution

Method used

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  • Method for synthesizing lithium nickel cobalt manganese oxide by using active substance separated from waste lithium power battery as raw material
  • Method for synthesizing lithium nickel cobalt manganese oxide by using active substance separated from waste lithium power battery as raw material
  • Method for synthesizing lithium nickel cobalt manganese oxide by using active substance separated from waste lithium power battery as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Disassemble the discharged lithium power battery to obtain a positive electrode.

[0029] (2) The positive electrode is immersed in 5 mol / L dimethylacetamide to separate the active material on the positive electrode from the current collector of the positive electrode.

[0030] (3) Filtrate and separate the current collector and active material, wash the separated active material with deionized water, centrifuge, dry the solid precipitate at 80°C, crush, vibrate and sieve to obtain the active material of the original waste positive electrode .

[0031] (4) Dissolve the obtained active substance in 12mol / L carbonic acid solution, the molar ratio of active substance and carbonic acid solution is 1:2, and add 1mol / L hydrogen peroxide, take supernatant after centrifugation, supernatant It is a mixed acid solution containing nickel ions, cobalt ions, and manganese ions, and the concentration of nickel ions, cobalt ions, and manganese ions in the supernatant is detected ...

Embodiment 2

[0040] (1) Disassemble the discharged lithium power battery to obtain a positive electrode.

[0041] (2) The positive electrode is immersed in 8mol / L dimethylacetamide to separate the active material of the electrode from the current collector.

[0042] (3) Filtrating and separating the current collector and the active material, washing the separated active material with deionized water, drying at 90°C, crushing, and vibrating and sieving to obtain the active material of the original waste positive electrode.

[0043] (4) Dissolve the positive electrode active material obtained in step (3) in 15mol / L acetic acid solution, the molar ratio of the active material to the acetic acid solution is 1:2, and after adding 0.5mol / L hydrogen peroxide, centrifuge and take the upper A mixed acid solution containing nickel, cobalt and manganese is obtained from the clear solution, and the concentration of nickel, cobalt and manganese ions in the mixed acid solution is detected by titration. ...

Embodiment 3

[0050] (1) Disassemble the discharged lithium power battery to obtain a positive electrode.

[0051] (2) The positive electrode is immersed in 10 mol / L dimethylacetamide to separate the active material on the positive electrode from the current collector of the positive electrode.

[0052] (3) The current collector and active material are separated by filtration, and the separated active material is washed with deionized water, centrifuged, and the solid precipitate is dried at 90° C., crushed, and sieved by vibration to obtain the original waste positive active material.

[0053](4) Dissolve the positive electrode active material obtained in step (3) in the phosphoric acid solution of 15mol / L, the molar ratio of the active material to the phosphoric acid solution is 1:2, and after adding 2mol / L hydrogen peroxide, the supernatant is nickel-containing , cobalt, and manganese mixed acid solution, the concentration of nickel, cobalt, and manganese ions in the mixed acid solution ...

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Abstract

The invention discloses a method for synthesizing lithium nickel cobalt manganese oxide by using an active substance separated from a waste lithium power battery as a raw material. The method includesthe following steps: (1) disassembling a power lithium battery to obtain a positive electrode; and immersing the positive electrode in a solvent, filtering, centrifuging the filtrate to obtain a solid precipitate, and drying and crushing the solid precipitate to obtain an active substance; (2) dissolving the active substance into an inorganic weak acid, adding hydrogen peroxide, centrifuging, adding a salt containing nickel ions, a salt containing cobalt ions and a salt containing manganese ions to a supernatant, adjusting the concentration of nickel ions, cobalt ions and manganese ions in the supernatant, and then adding a complexing agent and a precipitating agent, performing centrifugal separation, and drying to obtain a lithium nickel cobalt manganese oxide precursor; and (3) mixing the lithium nickel cobalt manganese oxide precursor with a lithium ion-containing compound, calcining, cooling, crushing, and sieving. According to the scheme of the invention, the rapid and complete separation of a current collector and the active material in the waste power lithium battery can be achieved, and the integrity of the current collector structure can be better maintained.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a method for synthesizing nickel-cobalt lithium manganate by using active materials separated from waste lithium power batteries as raw materials. Background technique [0002] With the continuous increase of human consumption of electronic products, the demand for lithium-ion batteries with high energy density, high power density, high working voltage and long service life is increasing. Although lithium-ion batteries are known as "green energy" , but the resulting amount of battery scrap is shocking. In my country, about 10 billion waste batteries are produced every year, with a weight of about 300,000 tons. Among them, the cumulative scrap of electric vehicle power batteries is about 120,000 tons, which will pose a great threat to the human ecological environment. Waste lithium-ion batteries contain high-value metals such as cobalt, nickel, iron, aluminu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 常丽娟吴事浪刘素婷陈思竹刘倩琛伍建军
Owner 四川省有色冶金研究院有限公司
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