Method for recovering aluminum foil and positive active material from waste lithium ion battery

A positive electrode active material and lithium ion battery technology, applied in the chemical industry, can solve the problem of high loss rate of positive electrode active material, and achieve the effects of high screening efficiency, high separation efficiency and improved recovery rate

Inactive Publication Date: 2018-01-12
EAST CHINA UNIV OF SCI & TECH
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  • 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 aluminum foil and positive active material from waste lithium-ion batteries, which solves the problem of high loss rate of positive active material in traditional methods

Method used

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  • Method for recovering aluminum foil and positive active material from waste lithium ion battery
  • Method for recovering aluminum foil and positive active material from waste lithium ion battery
  • Method for recovering aluminum foil and positive active material from waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1 As shown, the recovery route is as follows:

[0048] Fully discharge the waste lithium cobalt oxide 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, put it into the conical flask; add N,N -After dimethylacetamide, put it into an ultrasonic cleaning machine, control the temperature at 60°C, and ultrasonic frequency at 20KHz, and wash for 30 minutes; filter, and recycle the separated organic solvent. The material is the current collector aluminum foil, and the undersize is the positive electrode active material and the conductive agent. In this example, the removal rate of the positive electrode active material was 71.71%.

[0049] The calculation formula of removal rate is as follows (hereinafter the same):

[0050]

[0051] In the formula, m 1 is the mass of the separated positive electrode material (positive electrode active mater...

Embodiment 2

[0053] Fully discharge the waste lithium cobalt oxide 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, put it into the conical flask; add N,N -After dimethylformamide, put it into an ultrasonic cleaning machine, control the temperature at 60°C, and 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. It is the current collector aluminum foil, and the undersize is the positive electrode active material and the conductive agent. In this example, the removal rate of positive electrode active material is 62.11%.

Embodiment 3

[0055] Fully discharge the waste lithium cobalt oxide 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, put it into the conical flask; add dimethyl to the conical flask After sulfoxide, put it into an ultrasonic cleaning machine, control the temperature at 40°C, and ultrasonic frequency at 20KHz, and wash for 30 minutes; filter, the separated solvent is recycled, and the solid matter is dried and passed through a 50 μm sieve, and the sieve is the current collector aluminum foil , the undersieve is positive electrode active material and conductive agent. In this example, the removal rate of positive electrode active material is 45.31%.

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Abstract

The invention provides a method for recovering an aluminum foil and a positive active material from a waste lithium ion battery. The method comprises the following steps: performing ultrasonic cleaning on a positive plate of the waste lithium ion battery in a solvent, then filtering and collecting a solid and enabling the solid to pass through a sieve of 50-100 [mu]m to respectively obtain the aluminum foil and the positive active material; the solvent is a non-proton polar organic solvent; and the ultrasonic cleaning conditions are as follows: 20-70 kHz and 20-100 DEG C. The method provided by the invention solves the problem of extremely-high loss rate of the positive active material in a traditional method.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for recycling aluminum foil and positive electrode active materials 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 wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/0525
CPCY02E60/10Y02W30/84
Inventor 于建国贺理珀孙淑英孙玉柱
Owner EAST CHINA UNIV OF SCI & TECH
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