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Method for separating and recycling cobalt and nickel from waste lithium-ion battery

A lithium-ion battery, separation and recovery technology, applied in the direction of battery recovery, waste collector recovery, recycling technology, etc., can solve the problems of high economic cost, secondary pollution, low separation efficiency, etc., and achieve efficient recycling and economical recycling cost, the effect of avoiding secondary pollution problems

Inactive Publication Date: 2020-06-02
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some methods for recovering metals in waste lithium-ion battery cathode materials have been proposed or developed, such as pyrometallurgy and hydrometallurgy processes to recover valuable metals, but secondary pollution will occur during the treatment process, and the economic cost is high. Some problems such as low separation efficiency

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  • Method for separating and recycling cobalt and nickel from waste lithium-ion battery
  • Method for separating and recycling cobalt and nickel from waste lithium-ion battery

Examples

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Embodiment 1

[0037] In this embodiment, a lithium cobalt oxide battery is taken as an example to describe a method for separating and recovering nickel and cobalt from waste lithium ion batteries.

[0038] Step 1. Manually disassemble the lithium cobalt oxide battery that has been discharged through the discharge process. The obtained positive electrode material is first washed with absolute ethanol for 3 to 5 times, then rinsed with a large amount of water, and then dried at 60°C for 12 hours to obtain a dry Cathode material.

[0039] Step 2, put the dried positive electrode material into the Erlenmeyer flask for leaching in a water bath constant temperature shaking box at 40°C. The specific operation is: fill a series of 250mL Erlenmeyer flasks with 180mL 5mol / L formic acid and volume fraction 8vol.% hydrogen peroxide solution, the volume ratio of the two is 6:1, then put the dry positive electrode material into the Erlenmeyer flask, and then put all the Erlenmeyer flasks into a constant...

Embodiment 2

[0048] Compared with Example 1, this implementation separates and recovers nickel and cobalt from the nickel-cobalt-manganese ternary battery, and all other conditions are the same. The concentrations of nickel and cobalt in the aqueous phase at the outlet of the extraction section were 243.8mg / L and 4.9mg / L respectively, and the nickel yield was 91.8%; the concentrations of cobalt and nickel in the aqueous phase at the outlet of the stripping section were 285.3mg / L and 10.2 mg / L or so, the cobalt yield can reach 97.2%.

Embodiment 3

[0050] Compared with Example 1, the extraction agent used in this implementation is P507, wherein the volume percentage of P507 and kerosene is 20:80, and the rest of the conditions are the same. The concentrations of nickel and cobalt in the aqueous phase at the outlet of the extraction section are about 247.5mg / L and 4.2mg / L respectively, and the nickel yield is 93.2%; the concentrations of cobalt and nickel in the aqueous phase at the outlet of the stripping section are respectively 287.7mg / L and 9.6 mg / L or so, the cobalt yield can reach 98.0%.

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Abstract

The invention belongs to the field of waste lithium-ion battery recycling, and provides a method for separating and recycling cobalt and nickel from a waste lithium-ion battery. Firstly, a positive electrode material is dismounted from the waste lithium-ion battery, and then is placed in a mixed solution of organic acid and a reducing agent to be soaked, leachate is subjected to extraction operation, a high-nickel solution can be obtained, through washing and reverse extraction segment operation, a high-cobalt solution is obtained, and cobalt and nickel can be recycled from the waste lithium-ion battery. The method for separating and recycling the cobalt and the nickel from the waste lithium-ion battery combines recycling of the waste lithium-ion battery with hydrometallurgy, the organic acid is adopted for acid leaching, the method is more environment-friendly and economic, the method has certain environment benefits and economic benefits in the battery recycling field, the method isefficient and easy to operate, safe, reliable and small in secondary pollution, the secondary pollution in the traditional process can be avoided, recycling cost is saved, and efficient recycling of resources is achieved.

Description

technical field [0001] The invention belongs to the field of recycling waste lithium ion batteries, in particular to a method for separating and recovering nickel and cobalt from waste lithium ion batteries. Background technique [0002] In the past two decades, a variety of portable electronic devices have entered every aspect of people's lives, and a large number of rechargeable batteries have been produced and applied. Among rechargeable batteries, lithium-ion batteries are widely used due to their high operating voltage, high energy density, no memory effect, light weight, small size, low self-discharge rate, long cycle life, and wide operating temperature range. However, due to the expansion of market demand, the output of lithium-ion batteries has grown rapidly, and a large number of waste lithium-ion batteries will inevitably be produced. The organic electrolytes and heavy metals of waste lithium-ion batteries are toxic. If they are leaked by improper treatment, they...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B7/00C22B3/38H01M10/54
CPCC22B23/0415C22B7/006H01M10/54C22B3/3842C22B3/3844Y02W30/84Y02P10/20
Inventor 时鹏辉王康郭灏戴磊唐梦阳刘灿聂文龙张之赟李世吉支慧王梦媛张雪枫杨玲霞范金辰闵宇霖徐群杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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