Method for recovering cobalt and lithium metals in waste lithium-ion battery

A lithium-ion battery and recycling method technology, applied in the field of lithium-ion battery recycling, can solve the problems of secondary pollution of reagents, consumption of large organic solvents, secondary pollution of water bodies, etc., to reduce energy consumption and cost, facilitate industrial production, and avoid The effect of pollution

Inactive Publication Date: 2020-06-19
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can recover nickel and cobalt from waste lithium batteries, the operation is complicated and cannot eliminate secondary pollution
Chinese patent (CN104868190A) discloses a method of using reducing agent and organic acid to leach metals in waste lithium-ion battery positive electrode materials. The method utilizes organic acids such as formic acid and reducing agents to improve the metal leaching rate, but the price of formic acid High, and will cause secondary pollution to the water body, and hydrogen peroxide is unstable, a large amount of storage is a safety hazard
Chinese patent (CN102665912A

Method used

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  • Method for recovering cobalt and lithium metals in waste lithium-ion battery

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Experimental program
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Example Embodiment

[0039] Example 1

[0040] (1) Take a brand of waste lithium-ion battery and dismantle it manually to obtain 200g of positive electrode sheet containing aluminum foil and positive electrode material;

[0041] (2) Cut 30g positive electrode pieces into small pieces with a length of 5cm and a width of 6cm and soak them in 100mL DMAC, put the beaker containing the positive electrode pieces and the separator in an ultrasonic environment, adjust the temperature to 30°C, adjust the ultrasonic power to 300W, and ultrasonically adjust the temperature to 30°C. The time is 60min, and then the aluminum foil is taken out to obtain the mixed solution;

[0042] (3) The mixed solution containing the positive electrode material was obtained by rotary evaporation at 80°C to obtain a solid substance, and the solid substance was dried at 105°C to obtain 14.3 g of a lithium ion battery positive electrode material;

[0043] (4) take 10g positive electrode material and mix with 10g nitrilotriacetic...

Example Embodiment

[0046] Example 2

[0047] (1) Take a brand of waste lithium-ion battery and dismantle it manually to obtain 300g of positive electrode sheet including aluminum foil and positive electrode material;

[0048] (2) Cut 40g positive electrode pieces into small pieces with a length of 5cm and a width of 6cm and soak them in 150mL DMAC, put the beaker containing the positive electrode pieces and the separator in an ultrasonic environment, adjust the temperature to 50°C, adjust the ultrasonic power to 300W, and ultrasonically The time is 60min, and then the aluminum foil is taken out to obtain the mixed solution;

[0049](3) The mixed solution containing the positive electrode material was obtained by rotary evaporation at 80°C to obtain a solid substance, and the solid substance was dried at 105°C to obtain 25.6 g of lithium ion battery positive electrode material;

[0050] (4) take 25.6g of positive electrode material and mix with 30g of sodium aminotriacetate and carry out mechani...

Example Embodiment

[0053] Example 3

[0054] (1) Take a brand of waste lithium-ion battery and dismantle it manually to obtain 200g of positive electrode sheet containing aluminum foil and positive electrode material;

[0055] (2) Cut 30g positive electrode pieces into small pieces with a length of 5cm and a width of 6cm and soak them in 100mL DMAC, place the beaker containing the positive electrode pieces and the separator in an ultrasonic environment, adjust the temperature to 30°C, adjust the ultrasonic power to 200W, and ultrasonically adjust the temperature to 30°C. The time is 80min, and then the aluminum foil is taken out to obtain the mixed solution;

[0056] (3) subjecting the mixed solution containing the positive electrode material to rotary evaporation at 80° C. to obtain a solid substance, and drying the solid substance at 105° C. to obtain 15.8 g of a lithium-ion battery positive electrode material;

[0057] (4) take 15.8g of positive electrode material and mix with 20g of disodiu...

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Abstract

The invention discloses a method for recovering cobalt and lithium metals from a waste lithium-ion battery. The method comprises the following steps: disassembling the waste lithium-ion battery to obtain a positive plate; cutting the positive plate into small blocks, soaking the small blocks into a separation solution, placing the separation solution with the soaked the positive plate in an ultrasonic environment for a period of time, and taking out an aluminum foil to obtain a mixed solution; carrying out rotary evaporation on the obtained mixed solution to obtain a solid substance, and drying the solid substance to obtain a lithium-ion battery positive electrode material; mixing the positive electrode material with a chelating agent and then carrying out mechanical activation treatment to obtain an activated mixture; and carrying out acid leaching treatment on the obtained activated mixture to obtain an enriched solution containing cobalt and lithium. The operation method is simple,no secondary pollution exists in the recycling process, the cost is low, the industrial production is easy, and the cobalt and lithium metal recycling rate of the positive electrode material of the waste lithium-ion battery can reach 100%.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery recovery, and in particular relates to a recovery method for cobalt and lithium metal in waste lithium ion batteries. Background technique [0002] With the development of technology, batteries have become an indispensable power source for electrical appliances in daily life. Since the 1990s, lithium batteries have replaced wired power supplies and fuel power supplies with their significant advantages such as large capacity, small size, high specific energy, and high operating voltage, and have become the energy and power guarantee for modern technological development. China is the world's largest lithium battery production and manufacturing base. It is estimated that by 2020, the amount of scrapped lithium-ion batteries in my country will reach 32.2GWh. [0003] Lithium-ion batteries are consumables, and they are scrapped after their service life has been reached due to the decline i...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M10/0525C22B7/00C22B26/12C22B23/00
CPCC22B7/007C22B23/0415C22B26/12H01M10/0525H01M10/54Y02E60/10Y02W30/84Y02P10/20
Inventor 赵磊殷进李硕高婷刘瑞勇
Owner YANGZHOU UNIV
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