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Method for recycling valuable metal in waste ternary lithium ion battery

A technology for lithium-ion batteries and valuable metals, which is applied in the field of recycling valuable metals in waste ternary lithium-ion batteries, can solve the problems of inability to obtain pure products, difficult and complex waste treatment, and increased equipment investment, so as to achieve the same treatment cost Secondary pollution, wide application range and low treatment cost

Pending Publication Date: 2022-05-13
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mechanical method is difficult to process complex wastes and cannot obtain pure products. The high-temperature process involved in pyrometallurgy may increase equipment investment and cause secondary pollution. Hydrometallurgy is preferred due to its low economic cost and availability of pure products. attracted more and more attention
Hydrometallurgy mainly includes acid leaching, alkali leaching, and biological leaching. The process often consumes a large amount of strong oxidizing and acidic chemical reagents such as hydrogen peroxide, sodium sulfite, and sulfuric acid. secondary pollution

Method used

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  • Method for recycling valuable metal in waste ternary lithium ion battery
  • Method for recycling valuable metal in waste ternary lithium ion battery
  • Method for recycling valuable metal in waste ternary lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 operation process such as figure 1 shown. details as follows:

[0054] Discharge the waste 622-type nickel-cobalt-manganese ternary lithium-ion battery and disassemble it in a glove box to obtain NCM622 positive electrode powder; add 10mL peracetic acid solution dropwise at a rate of 2mL / min to a sample bottle containing 0.5g NCM622 positive electrode powder Among them, the volume concentration of peracetic acid in the peracetic acid solution is 5.0%, in addition, the reaction temperature is controlled by an oil bath to be 60°C, the rotating speed is controlled by magnetic stirring to be 600rpm, the reaction time is controlled to be 60min, and the solid-liquid ratio is controlled The content of lithium, nickel, cobalt, and manganese in the leaching solution was tested by ICP-MS (inductively coupled plasma mass spectrometry), and the leaching rates of lithium, nickel, cobalt, and manganese were 99.99%, 99.97%, 99.98%, and 99.99%, respectively. %.

[0055]...

Embodiment 2

[0057] Discharge the waste 622-type nickel-cobalt-manganese ternary lithium-ion battery and disassemble it in a glove box to obtain NCM622 positive electrode powder; add 10mL peracetic acid solution dropwise at a rate of 2mL / min to a sample bottle containing 0.5g NCM622 positive electrode powder Among them, the solid-to-liquid ratio is 50g / L. In addition, the reaction temperature is controlled by an oil bath to be 60°C, the rotational speed is controlled to be 600rpm by magnetic stirring, and the reaction time is controlled to be 60min. The volume concentration of peracetic acid in the peracetic acid solution is The leaching rate of lithium, nickel, cobalt, and manganese is 100%, 100%, 100%, and 100% through ICP-MS testing of the content of lithium, nickel, cobalt, and manganese elements in the leaching solution.

[0058] Obtain nickel-containing material and manganese-cobalt-lithium leachate through dimethylglyoxime, adjust the pH=7.8 of the leachate with sodium hydroxide or a...

Embodiment 3

[0060] Discharge the waste 622-type nickel-cobalt-manganese ternary lithium-ion battery and disassemble it in a glove box to obtain NCM622 positive electrode powder; add 10mL peracetic acid solution dropwise at a rate of 2mL / min to a sample bottle containing 0.5g NCM622 positive electrode powder Among them, the reaction temperature is controlled by an oil bath to be 60°C, and the reaction time is 60min. In addition, the rotating speed is controlled to be 600rpm by magnetic stirring, the solid-liquid ratio is controlled to be 50g / L, and the volume concentration of peracetic acid in the peracetic acid solution is The content of lithium, nickel, cobalt and manganese elements in the leaching solution was tested by ICP-MS, and the leaching rates of lithium, nickel, cobalt and manganese were 99.99%, 99.97%, 99.98% and 99.99%, respectively.

[0061] Use Cyanex 272 extractant, PC-88A extractant, and D2EHPA extractant for multiphase extraction of cobalt, nickel, and manganese. The extra...

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Abstract

The invention discloses a method for recycling valuable metals in waste ternary lithium ion batteries. The method comprises the following steps: mixing peroxy acid and positive electrode waste, and carrying out a leaching reaction to obtain a leaching solution; valuable metals in the leachate are recovered; the peroxy acid is a peroxy acid containing a peroxy group (-O-O) and a carboxyl group (-COOH). According to the method, multiple valuable metals in the positive electrode waste can be recovered at the same time only by using one reagent of peroxy acid, the extraction efficiency is high, and the leaching time is short.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery recycling, and in particular relates to a method for recycling valuable metals in waste ternary lithium ion batteries. Background technique [0002] With the development of society, renewable energy and clean energy have received more and more attention. Lithium-ion batteries are the most competitive rechargeable batteries in the new generation. They are called "green energy" and their working principle is simple. With better safety and longer charge and discharge life, it is considered to be the first choice for new power sources, and it is also the technology of choice to solve contemporary environmental pollution and energy problems. It is estimated that lithium-ion batteries will account for 70% of the rechargeable battery market by 2025. However, with the extensive use of lithium-ion batteries, a large amount of battery waste will be generated. It is estimated that by 2030, 11 mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12C22B47/00C22B23/00H01M10/54C01D15/08C07C51/44C22B3/20
CPCC22B7/006C22B7/007C22B26/12C22B47/00C22B23/0453C07C51/44C01D15/08H01M10/54C07C53/08Y02W30/84
Inventor 陈洪冯晓楠
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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