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A method for recovering positive electrodeactive material of a waste lithium ion battery

A positive active material, lithium-ion battery technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of high energy consumption, low recovery rate, easy pollution of waste gas and other problems, and achieve high recycling efficiency , removal thoroughly, high utilization effect

Inactive Publication Date: 2018-12-11
甘肃有色冶金职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the lithium-ion battery positive electrode material recovery technology in the prior art has disadvantages such as high energy consumption, low recovery rate, waste gas is easy to pollute the environment, and does not meet the needs of continuous production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present embodiment provides a method for reclaiming the positive electrode active material of the waste lithium-ion battery, comprising the following steps:

[0022] (1) Treat 50 g of the positive electrode sheet to be recovered at 200 ° C for 4 h to obtain a shedding mixture, and cool the mixture to 22 ° C; then add a mixture of dimethyl sulfoxide and ethanol at a volume ratio of 20:80 to the mixture solution, and reacted at 90°C for 12h; then sequentially cooled, filtered, washed, and separated to obtain the first solid;

[0023] (2) Treating the first solid at 685° C. for 3 hours to obtain active substance powder;

[0024] (3) Add 6mol / L HCl to the active material, react at 85°C for 1.5h; then add NaOH; then filter and separate to obtain the second solid; add lithium nitrate to the second solid and react at 820°C for 6h ; Then successively cooling, filtering, separating and drying to obtain the third solid.

Embodiment 2

[0026] This embodiment provides a method for reclaiming the active material of the positive electrode of the waste lithium-ion battery. The amount of each raw material involved is the same as that of Embodiment 1, including the following steps:

[0027] (1) Treat 50 g of the positive electrode sheet to be recovered at 300°C for 3.8h to obtain a shedding mixture, and cool the mixture to 26°C; then add dimethyl sulfoxide and ethanol at a volume ratio of 28:72 to the mixture to form Mix the solution and react at 120°C for 10 h; then cool, filter, wash, and separate to obtain the first solid;

[0028] (2) Treat the first solid at 720°C for 2.5 hours to obtain active substance powder;

[0029] (3) Add 8 mol / L HCl to the active material, react at 85°C for 1h; then add NaOH; then filter and separate to obtain the second solid; add lithium nitrate to the second solid and react at 860°C for 5h; Then cooling, filtering, separating, and drying were performed successively to obtain the t...

Embodiment 3

[0031] This embodiment provides a method for reclaiming the active material of the positive electrode of the waste lithium-ion battery. The amount of each raw material involved is the same as that of Embodiment 1, including the following steps:

[0032] (1) Treat 50 g of the positive electrode sheet to be recovered at 250° C. for 3.9 hours to obtain a shedding mixture, and cool the mixture to 25° C.; then add dimethyl sulfoxide and ethanol at a volume ratio of 25:75 to the mixture to form The solution was mixed and reacted at 100°C for 11 h; followed by cooling, filtering, washing, and separation to obtain the first solid;

[0033] (2) Treat the first solid at 700°C for 2.8 hours to obtain active substance powder;

[0034] (3) Add 7mol / L HCl to the active material, react at 85°C for 1.2h; then add NaOH; then filter and separate to obtain the second solid; add lithium nitrate to the second solid and react at 850°C for 5.5 h; followed by sequential cooling, filtration, separati...

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Abstract

The invention belongs to the technical field of waste lithium ion battery recovery, and provides a method for recovering positive electrode active material of a waste lithium ion battery. The method comprises the following steps: (1) heat-treating a positive electrode sheet to obtain a peeled mixture, and cooling the mixture; And then adding a mixed solution formed by dimethyl sulfoxide and ethanol to the mixture for reaction; Then sequentially cooling, filtering, washing and separating to obtain the first solid; 2) heat treat that first solid again to obtain the active material powder; 3. AddingHCl into that active substance for reaction; Then NaOH is added; Followed by sequential filtration to obtain a second solid; Adding a lithium source to the second solid and reacting; Then, the mixture is cooled, filtered and separated to obtain the third solid. The method has the advantages of clever design, high utilization rate of waste cathode plates, high recovery efficiency of active substances, and can be continuously produced, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of recycling waste lithium ion batteries, and in particular relates to a method for recycling positive electrode active materials of waste lithium ion batteries. Background technique [0002] Lithium-ion battery is a new generation of green high-energy battery with excellent performance, and has become one of the focuses of high-tech development. Lithium-ion batteries have the following characteristics: high voltage, high capacity, low consumption, no memory effect, no pollution, small size, small internal resistance, less self-discharge, and more cycles. Because of the above-mentioned characteristics, lithium-ion batteries have been applied to many civilian and military fields such as mobile phones, notebook computers, video cameras, and digital cameras. [0003] Lithium batteries are mainly composed of positive electrode materials, negative electrode materials, separators and electrolytes. Among them, th...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 苏瑞娟
Owner 甘肃有色冶金职业技术学院
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