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Method for recycling lithium, nickel, cobalt and manganese from waste lithium ion battery

A lithium-ion battery and lithium recovery technology, which is applied in the field of nickel, lithium recovery, cobalt, and manganese, can solve the problems of easy generation of toxic gases, etc., and achieve the effect of high extraction rate and high removal rate in the later stage

Inactive Publication Date: 2018-01-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for reclaiming lithium, nickel, cobalt, and manganese from waste lithium-ion batteries, which solves the problem that traditional methods are prone to producing toxic gases

Method used

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  • Method for recycling lithium, nickel, cobalt and manganese from waste lithium ion battery
  • Method for recycling lithium, nickel, cobalt and manganese from waste lithium ion battery
  • Method for recycling lithium, nickel, cobalt and manganese from waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Such as figure 1 As shown, the recovery route is as follows:

[0064] (1) Preprocessing:

[0065] Fully discharge the used lithium-ion battery, physically disassemble and remove the shell in the glove box, and take out the positive electrode piece; cut the positive electrode piece into a size of 2cm×2cm, and put it into the conical flask; add N,N-2 After methyl acetamide, put it into an ultrasonic cleaning machine, control the temperature at 60°C, and ultrasonic frequency at 20KHz, and wash for 30 minutes; filter, the separated organic solvent is recycled, and the solid matter is dried and passed through a 50 μm sieve. The current collector is aluminum foil, and the undersize is positive electrode active material and conductive agent. In this example, the removal rate of the positive electrode active material was 71.71%.

[0066] (2) Leach lithium, nickel, cobalt, manganese:

[0067] After the positive electrode material (active material and conductive agent) is com...

Embodiment 2

[0075] (1) Preprocessing:

[0076] Fully discharge the used lithium-ion battery, physically disassemble and remove the shell in the glove box, and take out the positive electrode piece; cut the positive electrode piece into a size of 2cm×2cm, and put it into the conical flask; add N,N-2 After methyl formamide, put it into an ultrasonic cleaning machine, control the temperature at 60°C, and the ultrasonic frequency at 40KHz, and wash for 30 minutes; filter, the separated solvent is recycled, and the solid matter is dried and passed through a 50 μm sieve. Fluid aluminum foil, the undersize is positive electrode active material and conductive agent. In this example, the removal rate of positive electrode active material is 62.11%.

[0077] (2) Leach lithium, nickel, cobalt, manganese:

[0078] After the positive electrode material is completely dried, a mixed solution composed of 1.5M succinic acid and 0.15M sodium bisulfite is added to carry out leaching reaction. The reactio...

Embodiment 3

[0080] (1) Preprocessing:

[0081] Fully discharge the used lithium-ion battery, physically disassemble and remove the shell in the glove box, and take out the positive electrode piece; cut the positive electrode piece into a size of 2cm×2cm, and put it into the Erlenmeyer flask; add ethanol to the Erlenmeyer flask, put it Put it into an ultrasonic cleaning machine, control the temperature at 70°C, and the ultrasonic frequency at 40KHz, and wash for 30 minutes; filter, the separated solvent is recycled, and the solid matter is dried and passed through a 50 μm sieve. Active material and conductive agent. In this example, the removal rate of positive electrode active material is 6.21%.

[0082] (2) Leach lithium, nickel, cobalt, manganese:

[0083] After the positive electrode material is completely dried, a mixed solution composed of 1M tartaric acid and 1.28M hydrogen peroxide is added for leaching reaction. The reaction temperature is 70°C, the time is 0.5h, and the solid-...

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Abstract

The invention provides a method for recycling lithium, nickel, cobalt and manganese from a waste lithium ion battery. The method for recycling lithium, nickel, cobaltand manganese from the waste lithium ion battery comprises the following steps of performing pretreatment of the positive electrode plate of the waste lithium ion battery to enable an aluminium foilto be separated from the positive electrode active material to obtain positive electrode active material powder; by taking a mixed liquid which consists of organic polyatomic acid and a reducing agentas a leaching agent, performing leaching of the positive electrode active material powder to obtain the leaching liquid; and extracting metal elements from the leaching liquid. Compared with the prior art, the method has the difference that the positive electrode active material is leached by adopting the organic polyatomic acid and the reducing agent instead of toxic inorganic acid, so that themethod disclosed in the invention does not generate toxic gas; and in addition, the recycled waste acid liquid can be subjected to biological degradation easily, without causing secondary pollution; and furthermore, the leaching efficiency is also improved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for recovering lithium, nickel, cobalt and manganese from waste lithium ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long life, low self-discharge rate, no memory effect, good cycle performance, and wide operating temperature range. They are widely used in portable electronic devices such as mobile phones, mobile power supplies, and notebooks. According to statistics, in 2010, the market share of lithium-ion batteries in secondary batteries has exceeded 67%. In addition, lithium-ion batteries will be the main energy source for next-generation electric vehicles and hybrid vehicles, which means that the consumption of lithium-ion batteries will further increase. Lithium-ion batteries are generally scrapped after 1-3 years of use. If the scrapped lithium batteries are discarded at will, it will cause great h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B26/12C22B23/00C22B47/00
CPCY02P10/20Y02W30/84
Inventor 于建国贺理珀孙淑英宋兴福
Owner EAST CHINA UNIV OF SCI & TECH
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