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Method for recycling lithium battery copper current collector by using sodium sulfite

A technology using sodium sulfite and sodium sulfite, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of complicated mechanical stripping process, difficulty in achieving uniformity, and low separation efficiency, and achieve simple process, low cost, Avoid complex effects

Inactive Publication Date: 2018-04-13
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, there is no direct and targeted process route for the recovery of copper elements in lithium-ion batteries. The separation efficiency of copper, cobalt, nickel, manganese and other metal elements is not high, and the mechanical stripping process is complicated and difficult to achieve uniformity.

Method used

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  • Method for recycling lithium battery copper current collector by using sodium sulfite

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Take out the cathode material of the lithium battery from the waste lithium battery, wash the cathode material with a mixed solution of acetone and ethanol at a volume ratio of 1:2, remove the organic solvent and organic binder, and then pulverize by a ball mill. Obtain the pretreated cathode material powder with a particle size of less than 300 mesh, the rotation speed of the ball mill is controlled at 50 pm, and the ball milling time is controlled at 2 hours;

[0032] (2) Mix the pretreated cathode material powder with 13% dilute hydrochloric acid, and keep stirring at a constant speed for 2 hours. After the cathode material is dissolved in the dilute hydrochloric acid, add excess sodium sulfite to form cuprous chloride-chlorine Sodium sulfide complex, let stand for 10 minutes, wait until precipitation is complete;

[0033] (3) Filter the mixed solution of the cuprous chloride-sodium chloride complex, take the clear solution and dilute it with the aqueous solution to o...

Embodiment 2

[0036] (1) Take out the lithium battery cathode material from the waste lithium battery, wash the cathode material with a 1:3 mixed solution of acetone and ethanol by volume to remove organic solvents and organic binders, and then pulverize with a ball mill. Obtain the pretreated cathode material powder with a particle size of less than 300 mesh, the rotation speed of the ball mill is controlled at 80 rpm, and the ball milling time is controlled at 2.5 hours;

[0037] (2) Mix the pretreated cathode material powder with 15% dilute hydrochloric acid, and keep stirring at a constant speed for 2.5 hours. After the cathode material is dissolved in the dilute hydrochloric acid, add excess sodium sulfite to form cuprous chloride-chlorine Sodium sulfide complex, let stand for 10 minutes, wait until precipitation is complete;

[0038] (3) Filter the mixed solution of the cuprous chloride-sodium chloride complex, take the clear solution and dilute it with the aqueous solution to obtain a cop...

Embodiment 3

[0041] (1) Take out the lithium battery cathode material from the waste lithium battery, wash the cathode material with a mixed solution of acetone and ethanol at a volume ratio of 1:4, remove organic solvents and organic binders, and then pulverize through a ball mill. Obtain the pretreated cathode material powder with a particle size of less than 300 mesh, the rotation speed of the ball mill is controlled at 160 rpm, and the ball milling time is controlled at 3.5 hours;

[0042] (2) Mix the pretreated cathode material powder with dilute hydrochloric acid with a concentration of 18%, and keep stirring at a constant speed for 3.5 hours. After the cathode material is dissolved in dilute hydrochloric acid, add excess sodium sulfite to form cuprous chloride-chlorine Sodium sulfide complex, let stand for 25 minutes, wait until precipitation is complete;

[0043] (3) Filter the mixed solution of the cuprous chloride-sodium chloride complex, take the clear solution and dilute it with the...

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Abstract

The invention provides a method for recycling a lithium battery copper current collector by using sodium sulfite. The method comprises the following steps: firstly adopting diluted hydrochloric acid to dissolve a positive electrode material; completely converting metallic elements in the positive electrode material into an ion form, and then adding sodium sulfite so that bivalent copper is reducedinto monovalent copper and forms a cuprous chloride-sodium chloride complex with sodium ions; adding deionized water for attenuation through a filter liquor so as to obtain a cuprous chloride sediment; after filtering again, adding cobalt, nickel, manganese and lithium in the filter liquor according to a raw material ratio for carrying out hydro-thermal synthesis, and thus obtaining the novel lithium ion positive electrode material. According to the method, the problem that a copper current collector is low in separation efficiency and is unlikely to separate from nickel, cobalt and manganesein the traditional technology is solved, and the recycling efficiency of copper element is improved; and moreover, the method is simple in working procedures and low in cost, and is applicable for large-scale production of factories.

Description

Technical field [0001] The invention relates to the technical field of lithium ion battery recovery, in particular to a method for recovering copper current collector of a lithium battery using sodium sulfite. Background technique [0002] Lithium ion battery is a kind of secondary battery, which is a new type of battery developed on the basis of lithium battery. It mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. Lithium-ion batteries have many advantages such as high voltage, large specific energy, long cycle life, good safety performance, low self-discharge, no memory effect, fast charge and discharge, and wide operating temperature range. They are widely used in electric vehicles, electric bicycles, Electric motorcycles, solar photovoltaic and wind power storage systems, smart grid energy storage systems, mobile communication base stations, electric power, chemical industry, hospital backup UPS, EPS power supplie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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