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Method for fabricating aluminum-doped ternary precursor by lithium ion battery positive electrode waste

A lithium-ion battery, aluminum doping technology, applied in the direction of battery electrodes, electrical components, secondary batteries, etc., can solve the problems of comprehensive recovery of unfavorable resources, a large amount of organic solvent waste liquid, nickel and cobalt precipitation, etc., to achieve economical and reasonable, good The effect of simple market prospect and overall process

Inactive Publication Date: 2019-05-14
HUNAN BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses an organic solvent soaking and dissolving method to remove the polymer adhesive (PVDF). However, the organic solvent cannot be recycled, and this process produces a large amount of organic solvent waste liquid, which causes certain harm to the environment.
Subsequent steps add sulfide salt to the copper removal process. On the one hand, the sulfide slag produced is hazardous waste, which is harmful to the environment. On the other hand, it will lead to the precipitation of part of nickel and cobalt, resulting in the loss of nickel and cobalt, which is not conducive to the comprehensive recovery of resources.

Method used

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  • Method for fabricating aluminum-doped ternary precursor by lithium ion battery positive electrode waste
  • Method for fabricating aluminum-doped ternary precursor by lithium ion battery positive electrode waste
  • Method for fabricating aluminum-doped ternary precursor by lithium ion battery positive electrode waste

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Effect test

Embodiment 1

[0041] A method for making an aluminum-doped ternary precursor by utilizing the waste material of the positive pole piece of a ternary lithium-ion battery, comprising the following steps:

[0042] (1) Get 100g of nickel-cobalt-lithium-manganese oxide positive pole piece waste material of ternary lithium-ion battery and break it into fragments of 2mm×2mm;

[0043] (2) Roasting the crushed positive electrode waste described in step (1) at 600° C. for 3.5 hours, removing the adhesive and conductive additives on the pole piece, and obtaining the ternary positive electrode material and aluminum foil;

[0044] (3) The positive electrode material and aluminum foil described in step (2) are heated and leached with sulfuric acid and hydrogen peroxide, the acid concentration is 3mol / l, the addition of reducing agent hydrogen peroxide is 8%, the leaching S / L is 250g / l, and the leaching The temperature is 85°C and the time is 4 hours. After the leaching, the solid-liquid separation is obt...

Embodiment 2

[0049] A method for making an aluminum-doped ternary precursor by utilizing the waste material of the positive pole piece of a ternary lithium-ion battery, comprising the following steps:

[0050] (1) Get 100g of nickel-cobalt-lithium-manganese oxide positive pole piece waste material of ternary lithium-ion battery and break it into fragments of 2mm×2mm;

[0051] (2) Roast the crushed positive electrode waste described in step (1) at 600°C for 3.5 hours to remove the adhesive and conductive additives on the pole piece to obtain the ternary positive electrode material and aluminum foil

[0052] (3) The positive electrode material and aluminum foil described in step (2) are heated and leached with sulfuric acid and sodium sulfite, the acid concentration is 2mol / l, the addition of reducing agent sodium sulfite is 8%, the leaching S / L is 250g / l, and the leaching The temperature was 85°C and the time was 4 hours. After leaching, solid-liquid separation was performed to obtain leach...

Embodiment 3

[0057] A method for making an aluminum-doped ternary precursor by utilizing the waste material of the positive pole piece of a ternary lithium-ion battery, comprising the following steps:

[0058] (1) Get 100g of nickel-cobalt-lithium-manganese oxide positive pole piece waste material of ternary lithium-ion battery and break it into fragments of 2mm×2mm;

[0059] (2) Roasting the crushed positive electrode waste described in step (1) at 600° C. for 3.5 hours, removing the adhesive and conductive additives on the pole piece, and obtaining the ternary positive electrode material and aluminum foil;

[0060] (3) The positive electrode material and aluminum foil described in step (2) are heated and leached with sulfuric acid and hydrogen peroxide, the acid concentration is 4mol / l, the addition of reducing agent hydrogen peroxide is 8%, the leaching S / L is 250g / l, and the leaching The temperature is 85°C and the time is 4 hours. After leaching, the solid-liquid separation is obtaine...

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Abstract

The invention discloses a method for fabricating an aluminum-doped ternary precursor by lithium ion battery positive electrode waste. The method comprises the following steps of smashing and roastinglithium battery positive electrode plate to obtain a ternary positive electrode material and an aluminum foil, adding an acid and a reducing agent for reaction and leaching, and performing selective extraction separation on a leaching liquid by employing tributyl phosphate to obtain a Ni-Co-Mn-Al solution; and preparing a corresponding nickel source, a cobalt source and a manganese source, adjusting a proportion of Ni-Co-Mn-Al to obtain a matched MS solution; and mixing the MS solution, ammonium hydroxide and an alkali metal hydroxide, and obtaining the aluminum-doped ternary precursor after reaction. According to the method, aluminum separation and a subsequent aluminum impurity removal process of the positive electrode plate are prevented, the aluminum-doped ternary precursor with a corresponding proportion is obtained by directly matching corresponding nickel, cobalt and manganese, and the method is economic and reasonable and has favorable market prospect.

Description

technical field [0001] The invention belongs to the field of recycling waste resources, and in particular relates to the recycling of valuable resources in lithium-ion batteries, in particular to a method for making aluminum-doped nickel-cobalt-manganese ternary precursors by utilizing positive electrode waste of ternary lithium-ion batteries. Background technique [0002] As a new type of chemical power source, lithium-ion electronics are widely used in mobile communications, new energy vehicles, Energy storage and other fields. However, after hundreds of times of charging and discharging of lithium-ion batteries, the specific capacity of the battery will decrease significantly, and the battery will be scrapped. [0003] As lithium-ion ternary batteries are more and more widely used in new energy vehicles, the demand is getting higher and higher, and the corresponding number of scrapped lithium-ion batteries and the scraps of positive electrodes produced in the correspondi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525H01M10/54C22B7/00C22B23/00C22B47/00C22B21/00C22B26/12
CPCY02E60/10Y02W30/84Y02P10/20
Inventor 王榆彬王杜乔延超陈若葵刘勇奇
Owner HUNAN BRUNP RECYCLING TECH
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