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Method for recovering valued metals from waste lithium cobaltate batteries

A technology of old lithium cobaltate and valuable metals, applied in the field of waste power battery recycling, can solve problems such as complicated steps, waste of resources, and environmental pollution, and achieve the effects of low cost, environmental friendliness, and simple process

Active Publication Date: 2012-10-03
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of existing methods for recovering valuable metals from waste lithium cobalt oxide batteries, such as complex steps, environmental pollution, and waste of resources, and to propose a self-recovery method with simple process, environmental friendliness, low cost and high recovery rate. Method for recovering valuable metals in waste lithium cobalt oxide batteries

Method used

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  • Method for recovering valued metals from waste lithium cobaltate batteries
  • Method for recovering valued metals from waste lithium cobaltate batteries
  • Method for recovering valued metals from waste lithium cobaltate batteries

Examples

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Embodiment 1

[0030] This embodiment provides a method for recovering valuable metals from waste lithium cobalt oxide batteries, which includes the following steps:

[0031] S1: Discharge the waste lithium cobalt oxide battery and use a shear to remove the outer packaging and shell of the battery, take out the battery, and crush the battery until the area of ​​the battery fragment is less than or equal to 6cm 2 .

[0032] S2: Soak the cell fragments in N,N-dimethylformamide, wherein the solid-liquid ratio of the cell fragments to N,N-dimethylformamide is 20g / L, and at the same time, treat with mechanical stirring and ultrasonic oscillation for 2 hours , to obtain a solid-liquid mixture.

[0033] S3: Filtrate the solid-liquid mixture obtained in step S2 to obtain a filtrate and a filter residue, and the filtrate N,N-dimethylformamide can be distilled and recycled after repeated use. The filter residue is washed and dried with N,N-dimethylformamide, and sieved on a 30-mesh vibrating sieve. ...

Embodiment 2

[0041] This embodiment provides a method for recovering valuable metals from waste lithium cobalt oxide batteries, which includes the following steps:

[0042] S1: Discharge the waste lithium cobalt oxide battery and use a shear to remove the outer packaging and shell of the battery, take out the battery, and crush the battery until the area of ​​the battery fragment is less than or equal to 5cm 2 .

[0043] S2: soak the cell fragments in N-methylpyrrolidone, wherein the solid-liquid ratio of the cell fragments to N-methylpyrrolidone is 60g / L, and mechanically stir and ultrasonically oscillate for 0.5h to obtain a solid-liquid mixture.

[0044] S3: Filtrate the solid-liquid mixture obtained in the step of soaking the cell fragments to obtain a filtrate and a filter residue, and the filtrate N-methylpyrrolidone can be distilled and recycled after being used many times. The filter residue is washed and dried with N-methylpyrrolidone, and sieved by a 40-mesh vibrating sieve. The...

Embodiment 3

[0052] This embodiment provides a method for recovering valuable metals from waste lithium cobalt oxide batteries, which includes the following steps:

[0053] S1: Discharge the waste lithium cobalt oxide battery and use a shear to remove the outer packaging and shell of the battery, take out the battery, and crush the battery until the area of ​​the battery fragment is less than or equal to 4cm 2 .

[0054] S2: Soak the cell fragments in a mixture of N,N-dimethylformamide and N-methylpyrrolidone with a mass ratio of 1:1, wherein the solid-liquid ratio of the cell fragments to the mixture is 100g / L , and simultaneously stirred and ultrasonically oscillated for 3 h to obtain a solid-liquid mixture.

[0055] S3: Filtrate the solid-liquid mixture obtained in the cell fragment soaking step to obtain the filtrate and filter residue. The mixture of N,N-dimethylformamide and N-methylpyrrolidone in the filtrate can be distilled and recycled after repeated use . The filter residue w...

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Abstract

The invention provides a method for recovering valued metals from waste lithium cobaltate batteries, belongs to the technical field of recovery of waste power batteries, and can solve the problems of complex steps, environmental pollution, resource waste and the like existing in the conational method for recovering the valued metals from the waste lithium cobaltate batteries. According to the method, active substances of the batteries are soaked and stripped through an organic solvent, so that most of adhesive can be dissolved to directly obtain clean aluminum, copper, nickel foils and membranes, and direct contact reaction of subsequent acid liquor and lithium cobaltate is promoted; the organic solvent can be used at multiple stages; finally, recovery by distillation is performed; and LiCoO2 is dissolved by using sulfuric acid solution to prevent toxic gas from being produced, improve the working conditions and protect the environment. The recovery method provided by the invention has the advantages of simple process, environmental friendliness, low cost and high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of recycling waste power batteries, in particular to a method for recycling valuable metals from waste lithium cobalt oxide batteries. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, light weight, small size, long cycle life, no memory and little pollution. They are widely used in portable electronic devices such as mobile phones, notebook computers and cameras, as well as in automobiles, aerospace and medical equipment. Applications. At present, the manufacturing cost of lithium-ion batteries continues to decrease, the application fields continue to expand, and the consumption continues to increase. Hundreds of millions of lithium-ion batteries are produced every year. LiCoO 2 Lithium-ion batteries prepared as cathode materials have the advantages of high working voltage (3.6V), stable discharge, suitable for high-current discharge, high specific energy...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C22B26/12H01M10/54
CPCY02E60/12Y02P10/20Y02W30/84
Inventor 刘三兵
Owner CHERY AUTOMOBILE CO LTD
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