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Method for leaching and recovering metal from lithium ion battery anode wastes based on electrochemical method

A lithium-ion battery, electrochemical method, applied in the field of lithium-ion battery cathode waste treatment, can solve the problems of high cost, high energy consumption, high energy consumption, etc., to avoid the use of reagents, reduce the amount of acid, reduce The effect of emissions

Active Publication Date: 2017-05-31
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry process is relatively simple, but the disadvantage is that the energy consumption is high, and other components in the electrolyte solution and electrodes are converted into carbon dioxide or other harmful components through combustion
This method uses organic acid and hydrogen peroxide reducing agent, the cost is high, the safety of peroxide is low, and it needs to be carried out under the conditions of stirring and heating, etc., the energy consumption is large, the efficiency is low, and more waste liquid is generated at the same time , not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Remove the shell of the waste battery, take out the aluminum foil current collector, crush the ternary positive electrode material to 50 mesh, and compact it to a thickness of 1cm as the cathode. The area of ​​the cathode is measured as 100cm 2 , the compacted density is 7g / cm 3 , with a carbon plate as the counter electrode. Add 0.2 mol of 98% concentrated sulfuric acid and 0.2 mol of sodium sulfate into 1 L of aqueous solution, and stir thoroughly. Next, put the cathode and anode in the electrolytic tank, pass the voltage of 0.4V, and the current of 2A direct current, and the leaching of all the nickel, cobalt and manganese only takes 20 minutes.

Embodiment 2

[0025] Remove the shell of the waste battery, take out the aluminum foil current collector, crush the ternary positive electrode material to 50 mesh, and compact it to a thickness of 1cm as the cathode. The area of ​​the cathode is measured as 100cm 2 , the compacted density is 7g / cm 3 , with a carbon plate as the counter electrode. Add 0.3 mol of 98% concentrated sulfuric acid and 0.2 mol of sodium sulfate into 1 L of aqueous solution, and stir thoroughly. Next, place the cathode and anode in the electrolytic tank, apply a direct current of 0.4V at a voltage of 0.4V, and a direct current of 2A, and the entire leaching of nickel, cobalt, and manganese only takes 25 minutes.

Embodiment 3

[0027] Remove the shell of the waste battery, take out the aluminum foil current collector, crush the ternary positive electrode material to 50 mesh, and compact it to a thickness of 1cm as the cathode. The area of ​​the cathode is measured as 100cm 2 , the compacted density is 7g / cm 3 , with a carbon plate as the counter electrode. Add 0.2 mol of 98% concentrated sulfuric acid and 0.3 mol of sodium sulfate into 1 L of aqueous solution, and stir thoroughly. Next, put the cathode and anode in the electrolytic tank, pass the voltage of 0.4V, and the current of 2A direct current, and the leaching of all the nickel, cobalt and manganese only takes 20 minutes.

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Abstract

The invention discloses a method for leaching and recovering metal from lithium ion battery anode wastes based on an electrochemical method. The method comprises the steps of compacting lithium ionanode waste powder into a flake shape as a negative electrode, adopting an inert electrode as a counter electrode, adopting a solution containing H<+>, K<+> and / or Na<+> as an electrolyte solution, and carrying out electrochemical reduction leaching under direct voltage to obtain an electrolyte solution containing metal ions. Compared with traditional acid leaching (acid plus a reducing agent), according to the method, the acid dosage is greatly reduced, the leaching time is short, the operation can be carried out at normal temperature, the leaching efficiency of metal in a manganese-nickel-cobalt ternary cathode material is greatly improved, the method is simple to operate, and wide in industrial prospect, and the cost is low.

Description

technical field [0001] The invention relates to a treatment method for lithium-ion battery positive electrode waste, in particular to a method for leaching and recovering metal from lithium-ion battery positive electrode waste by electrochemical method, and belongs to the technical field of secondary resource recycling and circular economy. Background technique [0002] With the widespread application of lithium-ion batteries in portable electronic products, the production and demand of lithium-ion batteries have increased dramatically, and the global annual production of lithium-ion batteries has increased by 800% from 2000 to 2010. Due to the further application of lithium-ion batteries in electric vehicles and smart grids, their demand will still increase significantly in the next decade. In 2013, South Korea, Japan and China accounted for more than 90% of the global production of lithium-ion batteries. At present, my country has become one of the largest producers, cons...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 张治安赖延清李军明文定强汤依伟方静洪波张凯李劼
Owner CENT SOUTH UNIV
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