Recycling method of positive electrode material of waste lithium cobalt oxide battery

A cathode material and recycling method technology, which is applied in the field of harmless treatment and recycling of electrode materials, can solve the problems of low recovery efficiency of lithium cobalt oxide, poor environmental friendliness, and high energy consumption, and achieves easy operation, environmental friendliness, The effect of low energy consumption

Inactive Publication Date: 2018-07-06
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a recovery method for the positive electrode material of the waste lithium cobalt oxide battery, aiming to solve the problem of low recovery efficiency of lithium cobalt oxide and high energy consumption due to the recovery method of the positive electrode material of the waste lithium cobalt oxide battery provided by the prior art. Technical issues with poor environmental friendliness

Method used

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  • Recycling method of positive electrode material of waste lithium cobalt oxide battery

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Experimental program
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Effect test

Embodiment 1

[0049] (1) Firstly, the waste lithium cobalt oxide battery is discharged, and the positive plate of the battery can be obtained after disassembly. Put the positive electrode sheet into a muffle furnace for calcination, the calcination temperature is 400°C, and the calcination time is 3 hours, and finally black lithium cobaltate powder can be obtained;

[0050] (2) Lithium cobaltate powder is added in the there-necked flask that the mixed solution of sulfuric acid, citric acid and hydrogen peroxide is housed by the solid-liquid ratio of 10g / L, citric acid and H 2 SO 4 Concentration is 2.0M, H 2 o 2 The concentration is 2vol.%, and then the three-neck flask is placed in a magnetic stirrer with microwave and heating functions for reaction. The reaction temperature is 40°C, the microwave power is 400w, the reaction time is 3 hours, and the stirring speed in the magnetic stirrer is 50r / min,;

[0051] (3) Adding concentration to the solution is 1.0M oxalic acid to react, the re...

Embodiment 2

[0055] (1) Firstly, the waste lithium cobalt oxide battery is discharged, and the positive plate of the battery can be obtained after disassembly. Put the positive electrode sheet into a muffle furnace for calcination, the calcination temperature is 550°C, and the calcination time is 2 hours, and finally black lithium cobaltate powder can be obtained;

[0056] (2) Add lithium cobaltate powder into a three-necked flask equipped with a mixture of sulfuric acid, hydrochloric acid and hydrogen peroxide at a solid-to-liquid ratio of 60g / L, the concentration of hydrochloric acid and sulfuric acid is 3.0M, and the concentration of H 2 o 2 The concentration is 3vol.%, and then the three-neck flask is placed in a magnetic stirrer with microwave and heating functions for reaction. The reaction temperature is 60°C, the microwave power is 700w, the reaction time is 3 hours, and the stirring speed in the magnetic stirrer is 200r / min,;

[0057] (3) Adding a concentration of 2M oxalic aci...

Embodiment 3

[0061] (1) Firstly, the waste lithium cobalt oxide battery is discharged, and the positive plate of the battery can be obtained after disassembly. Put the positive electrode sheet into a muffle furnace for calcination, the calcination temperature is 700°C, the calcination time is 0.5 hours, and finally black lithium cobaltate powder can be obtained;

[0062] (2) Add lithium cobaltate powder into a three-necked flask equipped with a mixture of sulfuric acid, hydrochloric acid and hydrogen peroxide at a solid-to-liquid ratio of 100g / L, the concentration of hydrochloric acid and sulfuric acid is 5.0M, and the concentration of H 2 o 2 The concentration is 5vol.%, and then the three-neck flask is placed in a magnetic stirrer with microwave and heating functions for reaction. The reaction temperature is 100°C, the microwave power is 1000w, the reaction time is 3 hours, and the stirring speed in the magnetic stirrer is 300r / min,;

[0063] (3) Adding concentration to the solution i...

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Abstract

The invention discloses a recycling method of a material of a waste lithium cobalt oxide battery. A positive electrode plate of the waste lithium cobalt oxide battery is subjected to calcining processing to obtain lithium cobalt oxide powder; then the lithium cobalt oxide powder, an acid solution and a hydrogen peroxide solution are mixed and reacted in an ultrasonic wave environment; and the obtained reaction liquid is added with oxalic acid and sodium carbonate in sequence to obtain lithium and cobalt precipitates. The recycling method of the material of the waste lithium cobalt oxide battery is simple and easy to operate, relatively low in energy consumption, environment-friendly, and does not generate secondary pollutants.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment and recycling of electrode materials, and in particular relates to a method for recycling positive electrode materials of waste lithium cobalt oxide batteries. Background technique [0002] Lithium-ion batteries, as electronic consumables, are invalid and scrapped after a certain number of years of use. Studies have shown that the positive and negative electrode materials, electrolyte, and electrolyte solvents of lithium-ion batteries have certain impacts on the environment and human health. Waste lithium batteries are discarded into the environment, and the substances in the batteries enter the environment due to rupture due to various reasons, which will cause environmental pollution. The discarding of lithium batteries is characterized by dispersion and randomness, so their pollution to the environment is long-term and slow. As the number of waste lithium-ion batteries increases, th...

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 张哲鸣吴正斌杨芳
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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