Recycling method of nickel-cobalt-manganese ternary lithium battery

A nickel-cobalt-manganese ternary lithium and ternary lithium battery technology, which is applied in the recycling field of nickel-cobalt-manganese ternary lithium batteries, can solve the problem of uneven distribution of nickel-cobalt-manganese elements, poor electrochemical performance of positive electrode materials, and the inability of Al elements Evenly enter the interior of the material lattice to achieve the effect of slowing down the precipitation and improving the uniformity

Pending Publication Date: 2022-02-01
ZHONGTIAN EMERGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the problem of uneven distribution of nickel, cobalt and manganese elements, and poor electrochemical performance of the final cathode material.
And, since Al(OH) 3 The solubility product of Ni, Co, and Mn is quite different from that of Ni, Co, and Mn. During the precipitation process, Ni, Co, and Mn start to precipitate after the Al element is completely precipitated, so that the Al element cannot evenly enter the interior of the material lattice, and it is difficult to obtain the four elements in the true sense. meta material

Method used

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  • Recycling method of nickel-cobalt-manganese ternary lithium battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] (1) After the waste nickel-watery three-membered lithium ion battery is fully discharged, the physical dismantling is performed, and the positive electrode sheet is obtained, and the positive electrode is broken, and the calcination temperature is 400 ° C, the calcination time is 3 hours, so that The active substance is separated from the aluminum foil. The screened was obtained from the waste positive electrode powder, and the powder was dissolved in a 1.5 mol / L sulfuric acid solution, and the starch was added to 6 to 8 g / L, the control temperature was 55 ° C, and the stirred leached for 30 minutes. After leaching, filter it to get Li + Ni 2+ , CO 2+ Mn 2+ Cu 2+ Al 3+ The first mixture of plasma.

[0084] (2) Add 3 times CU to the leaching liquid 2+ Moorer amount of sodium thiosulfate removes Cu 2+ After filtration, the purifying liquid is obtained.

[0085] (3) Determination of each metal ion ratio in the purifying liquid, then adding the corresponding sulfate, regula...

Embodiment 2

[0088](1) After the waste nickel-watery three-membered lithium ion battery is fully discharged, the physical dismantling is performed, and the positive electrode sheet is obtained, and the positive electrode is broken, and the calcination temperature is 400 ° C, the calcination time is 3 hours, so that The active substance is separated from the aluminum foil. The screened was obtained from the waste positive electrode powder, and the powder was dissolved in a 1.5 mol / L sulfuric acid solution, and the starch was added to 6 to 8 g / L, the control temperature was 55 ° C, and the stirred leached for 30 minutes. After leaching, filter it to get Li + Ni 2+ , CO 2+ Mn 2+ Cu 2+ Al 3+ The first mixture of plasma.

[0089] (2) Add 3 times CU to the leaching liquid 2+ Moorer amount of sodium thiosulfate removes Cu 2+ After filtration, the purifying liquid is obtained.

[0090] (3) Determination of each metal ion ratio in the purifying liquid, then adding the corresponding sulfate, regulat...

Embodiment 3

[0093] (1) After the waste nickel-watery three-membered lithium ion battery is fully discharged, the physical dismantling is performed, and the positive electrode sheet is obtained, and the positive electrode is broken, and the calcination temperature is 400 ° C, the calcination time is 3 hours, so that The active substance is separated from the aluminum foil. The screened was obtained from the waste positive electrode powder, and the powder was dissolved in a 1.5 mol / L sulfuric acid solution, and the starch was added to 6 to 8 g / L, the control temperature was 55 ° C, and the stirred leached for 30 minutes. After leaching, filter it to get Li + Ni 2+ , CO 2+ Mn 2+ Cu 2+ Al 3+ The first mixture of plasma.

[0094] (2) Add 3 times CU to the leaching liquid 2+ Moorer amount of sodium thiosulfate removes Cu 2+ After filtration, the purifying liquid is obtained.

[0095] (3) Determination of each metal ion ratio in the purifying liquid, then adding the corresponding sulfate, regula...

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Abstract

The invention provides a recycling method of a nickel-cobalt-manganese ternary lithium battery. The recycling method comprises the following steps: pre-treating the nickel-cobalt-manganese ternary lithium battery to obtain positive electrode powder; dissolving the positive electrode powder in an acid solution, and adding a reducing agent to obtain a first mixed solution; adding a complexing agent and a precipitator into the first mixed solution, complexing the complexing agent with the aluminum ions, adjusting the pH value of the first mixed solution, precipitating nickel ions, cobalt ions, manganese ions and aluminum ions to obtain a quaternary precursor, and obtaining a second mixed solution; adding sodium carbonate into the second mixed solution to precipitate lithium ions, and mixing the precipitated lithium carbonate with the quaternary precursor to obtain a mixed precipitate; according to the recycling method of the nickel-cobalt-manganese ternary lithium battery, the complexing agent is added, the complexing agent is complexed with the aluminum ions in the first mixed solution, precipitation of the aluminum ions is slowed down, the pH value of the first mixed solution is adjusted, and nickel ions, cobalt ions, manganese ions and the aluminum ions are co-precipitated.

Description

Technical field [0001] The present application relates to the field of new energy and environmental protection, and more particularly to a recovery method of nickel-cobalt-manganese ternary lithium batteries. Background technique [0002] Due to the continuous depletion of fossil energy in global, the extension of the greenhouse gas is caused, the earth's ecological environment has led to the continuous deterioration of human civilization, so the power battery will be born, and become a replacement of vehicle energy. The three-dimensional lithium-ion battery has the advantages of high capacity, larger energy density, high operating voltage, high self-discharge, cycle performance, etc., which can be widely used in the consumer battery market, and occupy the main share of the power battery market in the electric vehicle. As the amount of lithium-ion battery installation increases, when it reaches the service life, the disposal of waste lithium-ion batteries is also more severe. Was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M10/54H01M10/0525
CPCC01G53/44H01M10/54H01M10/0525C01P2006/40Y02E60/10Y02W30/84
Inventor 张祥朱玲玲方秀利张刚薛济萍
Owner ZHONGTIAN EMERGING MATERIALS CO LTD
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