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 recy

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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Example Embodiment

[0075] Example 1:

[0076] Disassemble the core of the waste ternary lithium ion battery after safe discharge. After the core is broken, the core is first placed in the air and roasted at 400℃ for 5h, the heating rate is 5℃ / min, and then chlorine gas is introduced at 600℃. Roast for 3h. Sieving the active material and the pole piece, and leaching the powder (active material) in water. 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, and then add sodium thiosulfate until there is no more precipitation, filter again.

[0077] Determine the ratio of Ni, Co, Mn of the filtrate after removing impurities, and add the corresponding sulfates to it 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 to it, control the added amount so tha...

Example Embodiment

[0083] Example 2:

[0084] Disassemble the core of the waste ternary lithium ion battery after safe discharge. After the core is broken, it is first placed in the air and roasted at 500℃ for 3h, the heating rate is 10℃ / min, and then chlorine gas is introduced at 500℃. Roast for 3h. Sieving the active material and the pole piece, and leaching the powder (active material) in water. After the reaction is complete, filter out the black insolubles, add 5mol / L NaOH solution to the filtrate to adjust the pH=4, after the reaction is complete, filter the insoluble precipitate, and then add sodium thiosulfate until there is no more precipitation, filter again.

[0085] Determine the ratio of Ni, Co, Mn in the filtrate after removing impurities, and add the corresponding sulfates to it 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 to it, control the addition amount so that Li: ...

Example Embodiment

[0086] Example 3:

[0087] Disassemble the core of the waste ternary lithium-ion battery after safe discharge. After the core is broken, the core is first placed in the air and roasted at 400℃ for 3h, the heating rate is 10℃ / min, and then sulfur dioxide is introduced at 300℃. Roast for 10h. Sieving the active material and the pole piece, and leaching the powder (active material) in water. After the reaction is completed, the black insoluble matter is filtered off, and 6 mol / L NaOH solution is added to the filtrate to adjust the pH=5. After the reaction is completed, the insoluble precipitate is filtered, and then sodium persulfate is added until there is no more precipitation, and then filtered again.

[0088] Determine the ratio of Ni, Co, Mn of the filtrate after removing impurities, and add the corresponding sulfates to it 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, add sodium carbona...

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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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