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Method for preparing and recovering ternary anode material from waste nickel-cobalt-manganese ternary lithium ion batteries

A technology for nickel-cobalt-manganese-lithium and ion batteries is applied in the field of preparing nickel-cobalt-manganese ternary positive electrode materials, which can solve the problems of complex process and low electrical performance of products, and can shorten the process flow, improve the electrochemical performance, and achieve high repeatability. Effect

Active Publication Date: 2017-06-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve technical problems such as the complex process of existing recycling methods and the low electrical properties of recovered products, the present invention provides a method for recycling and preparing ternary positive electrode materials from waste nickel-cobalt-manganese ternary lithium-ion batteries, aiming at Improving the electrical properties of recycled ternary cathode materials

Method used

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  • Method for preparing and recovering ternary anode material from waste nickel-cobalt-manganese ternary lithium ion batteries
  • Method for preparing and recovering ternary anode material from waste nickel-cobalt-manganese ternary lithium ion batteries
  • Method for preparing and recovering ternary anode material from waste nickel-cobalt-manganese ternary lithium ion batteries

Examples

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Effect test

Embodiment 1

[0076] Disassemble the waste ternary lithium-ion battery after safe discharge and remove the winding core. After the winding core is broken, it is first placed in the air and roasted at 400°C for 5h at a heating rate of 5°C / min. Under roasting for 3h. Sieve the active material and pole pieces, and put the powder (active material) in water for leaching. After the reaction is complete, filter out the black insoluble matter, add 2mol / L NaOH solution to the filtrate to adjust the pH=3, after the reaction is complete, filter the insoluble precipitate, then add sodium thiosulfate until no more precipitate occurs, and filter again.

[0077] Measure the ratio of Ni, Co, and Mn of the filtrate after impurity removal, and add corresponding sulfate thereto according to the ratio, adjust the ratio to 1:1:1, and then add 2mol / L NaOH solution to adjust the pH=10. After the reaction is complete, add sodium carbonate therein, control the addition so that Li: (Ni+Co+Mn)=1.05, make Li 2 CO 3...

Embodiment 2

[0084] Disassemble the waste ternary lithium-ion battery after safe discharge and take out the winding core. After the winding core is broken, it is first placed in the air and roasted at 500°C for 3 hours at a heating rate of 10°C / min. Under roasting for 3h. Sieve the active material and pole pieces, and put the powder (active material) in water for leaching. After the reaction is complete, filter out the black insoluble matter, add 5 mol / L NaOH solution to the filtrate to adjust the pH=4, after the reaction is complete, filter the insoluble precipitate, then add sodium thiosulfate until no more precipitate occurs, and filter again.

[0085] Measure the ratio of Ni, Co and Mn of the filtrate after impurity removal, and add corresponding sulfate thereto according to the ratio, adjust the ratio to 1:1:1, and then add 2mol / L NaOH solution to adjust the pH=10.5. After the reaction is complete, add sodium carbonate therein, control the addition so that Li: (Ni+Co+Mn)=1.1, make Li...

Embodiment 3

[0087] Disassemble the waste ternary lithium-ion battery after safe discharge and take out the winding core. After the winding core is broken, it is first placed in the air and roasted at 400°C for 3 hours at a heating rate of 10°C / min, and then sulfur dioxide is introduced. Under roasting for 10h. Sieve the active material and pole pieces, and put the powder (active material) in water for leaching. After the reaction is complete, filter out the black insoluble matter, add 6mol / L NaOH solution to the filtrate to adjust the pH=5, after the reaction is complete, filter the insoluble precipitate, then add sodium persulfate until no more precipitate occurs, and filter again.

[0088] Measure the ratio of Ni, Co, and Mn of the filtrate after impurity removal, and add corresponding sulfate thereto according to the ratio, adjust the ratio to 1:1:1, and then add 6mol / L NaOH solution to adjust the pH=11. After the reaction is complete, sodium carbonate is added thereto, and the amount...

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Abstract

The invention discloses a method for preparing and recovering a ternary anode material from waste nickel-cobalt-manganese ternary lithium ion batteries. The method is characterized by including steps: step 1, subjecting the waste nickel-cobalt-manganese ternary lithium ion batteries to disassembling, crushing, calcining and leaching to obtain leachate which contains Li, Ni, Co and Mn, and subjecting the leachate to decontamination to obtain decontaminated liquid; step two, adjusting a molar ratio of Ni, Co and Mn in the decontaminated liquid, adding alkali metal hydroxides, adjusting system pH to be larger than or equal to 10, and performing primary precipitation to obtain turbid solution with NCM hydroxide precipitates; step 3, adding carbonates into the turbid solution obtained at the step 2 to realize secondary precipitation, and performing solid-liquid separation to obtain a ternary material precursor; step 4, calcining the ternary material precursor in air to obtain the ternary anode material. The method is simple in process, extensive in raw material source and high in repeatability, and the ternary anode material prepared according to the method is excellent in performance and available for large-scale production.

Description

[0001] Technical field: [0002] The invention relates to the field of waste lithium-ion battery recycling, in particular to a method for preparing a nickel-cobalt-manganese ternary positive electrode material in one step by using waste ternary lithium-ion batteries as raw materials. [0003] Background technique: [0004] The increasing shortage of energy and the serious changes in the earth's ecological environment are gradually becoming two major obstacles to the development of human civilization. It is imperative to develop new energy sources and research and develop new, non-polluting energy-saving materials and energy storage and conversion materials. With the increase of energy demand and the continuous development of the electronic market and electric vehicle market, lithium-ion batteries are favored by people due to their superior performance such as safety, environmental protection, high specific energy and good electrochemical performance. [0005] According to stati...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/54Y02E60/10Y02W30/84
Inventor 赖延清杨声海王麒羽张治安洪波方静张凯李劼
Owner CENT SOUTH UNIV
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