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Method for preparing ternary anode material precursor from waste lithium battery anode pieces

A technology for used lithium batteries and positive electrode sheets, which is applied in battery electrodes, electrical components, battery recycling, etc., can solve the problems of high cost and slightly toxic organic solvents, enhance structural stability, simplify recycling processes, and improve electricity. Effects of Chemical Properties and Cycling Stability

Active Publication Date: 2018-11-27
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former organic solvent is slightly toxic and the cost is high; the latter uses strong alkali to cause waste liquid treatment problems, and aluminum recovery has to go through more complicated steps to extract from the alkali leaching filtrate

Method used

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  • Method for preparing ternary anode material precursor from waste lithium battery anode pieces

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Embodiment 1

[0022] The method for preparing the precursor of the ternary positive electrode material by utilizing the positive electrode sheet of the waste lithium battery, the steps are as follows:

[0023] Take 20g of the positive electrode tape of the waste ternary lithium-ion battery and immerse it in 1L of sulfuric acid solution with a concentration of 3mol / L. The active material of the positive electrode is completely peeled off from the aluminum foil current collector, and the aluminum foil is taken out for recycling. Add 0.5 L of 1.5 mol / L sodium thiosulfate solution to the acid solution, stir and leaching at 60°C for 80 minutes, filter after leaching to obtain a mixed solution of nickel, cobalt, manganese, lithium, and aluminum sulfate. Use sodium hydroxide solution to adjust the pH value of the solution to 3.0, extract with P204, use the raffinate as the raw material solution after two-stage extraction, and adjust the content of nickel, cobalt, and manganese ions to make it meet ...

Embodiment 2

[0025] The method for preparing the precursor of the ternary positive electrode material by utilizing the positive electrode sheet of the waste lithium battery, the steps are as follows:

[0026] Take 30g of the positive electrode tape of the waste ternary lithium-ion battery and immerse it in 1L hydrochloric acid solution with a concentration of 0.5mol / L. The active material of the positive electrode is completely peeled off from the aluminum foil current collector, and the aluminum foil is taken out for recycling. Add 0.6 L of hydrogen peroxide solution with a concentration of 0.3 mol / L to the acid solution, stir and leach for 50 minutes at 40°C, filter after leaching to obtain a mixed solution of nickel, cobalt, manganese, lithium, and aluminum sulfate. Use sodium hydroxide solution to adjust the pH value of the solution to 3.5, extract with P204, and use the raffinate as the raw material solution after the three-stage extraction to adjust the content of nickel, cobalt, and ...

Embodiment 3

[0028] The method for preparing the precursor of the ternary positive electrode material by utilizing the positive electrode sheet of the waste lithium battery, the steps are as follows:

[0029] Take 40g of the positive electrode tape of the waste ternary lithium-ion battery and immerse it in 3L of nitric acid solution with a concentration of 1mol / L. The active material of the positive electrode is completely peeled off from the aluminum foil current collector, and the aluminum foil is taken out for recycling. Add 1 L of sodium sulfite solution with a concentration of 1 mol / L to the acid solution, stir and leach for 40 minutes at 70°C, filter after leaching to obtain a mixed solution of nickel, cobalt, manganese, lithium, and aluminum sulfate. Use sodium hydroxide solution to adjust the pH value of the solution to 4.0, extract with P507, use the raffinate as the raw material solution after two-stage extraction, and adjust the content of nickel, cobalt, and manganese ions to ma...

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Abstract

The invention provides a method for preparing a ternary anode material precursor from waste lithium battery anode pieces. The method comprises the following steps: separating active substances from analuminum foil current collector in an anode material acid soaking procedure, directly recycling aluminum foil, regulating dissolved aluminum ions to a specific content in a later extraction and impurity removal step, and enabling the aluminum ions as a doping agent to join in nickel-cobalt-manganese coprecipitation reactions, thereby obtaining an aluminum doped nickel-cobalt-manganese ternary precursor. By adopting the method, an anode material recycling procedure can be effectively simplified, the cost can be reduced, various metallic elements in a waste ternary lithium battery anode can besufficiently utilized, a high-value aluminum doped nickel-cobalt-manganese ternary material precursor can be developed, and due to adoption of the aluminum doping agent, the electrochemical propertiesand the circulation stability of a ternary anode material can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery electrode materials, in particular to a method for preparing a ternary positive electrode material precursor by using waste lithium battery positive pole pieces. Background technique [0002] With the rapid development of the new energy vehicle industry, my country has become the largest country in the production and sales of new energy vehicles, and the production and sales of power lithium batteries have also increased year by year. After 2013, new energy vehicles have been promoted and applied on a large scale. By the end of 2017, the cumulative promotion of new energy vehicles More than 1.8 million vehicles, equipped with about 86.9GWh of power lithium batteries. According to comprehensive calculations by industry experts from the aspects of enterprise warranty period, battery cycle life, and vehicle operating conditions, new energy vehicle power lithium batteries will enter large-s...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/505H01M4/525H01M4/485C22B7/00
CPCC22B7/007H01M4/485H01M4/505H01M4/525H01M10/54Y02E60/10Y02P10/20Y02W30/84
Inventor 李会林郭强李永利田登超付明波赵俊利李申朱顺伟
Owner 郑州中科新兴产业技术研究院
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