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Method for recycling lithium-ion battery positive electrode scraps

A technology of lithium-ion batteries and ion batteries, which is applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve problems such as unfavorable human health and inability to remove carbon, and achieve short process, low energy consumption, and simple operation Effect

Active Publication Date: 2018-05-11
天齐锂业(江苏)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only applicable to lithium cobalt oxide cathode materials and cannot remove carbon from cathode materials
The organic solvent NMP used in the separation process is a toxic substance, which is not conducive to human health

Method used

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  • Method for recycling lithium-ion battery positive electrode scraps
  • Method for recycling lithium-ion battery positive electrode scraps
  • Method for recycling lithium-ion battery positive electrode scraps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Take 50g of lithium cobaltate (LCO) positive electrode scraps and crush them with a pulverizer until the pieces are about 5mm in size. smash.

[0048] After filtering and drying the filter residue, sieve with a standard inspection sieve to obtain 8.0 g of positive electrode material powder collected under the sieve and aluminum particles remaining on the sieve.

[0049] Take 500mL of 2.0mol / L LiOH solution, wash and sieve the positive electrode material with this solution for 30min, then let it stand until the solution is clear, decant the upper layer and floating matter, filter the bottom slurry, wash the filter cake with water, filter and dry That is, 40.2 g of a qualified positive electrode material was obtained. The recycling process is shown in Figure 4 , the composition of the recovered positive electrode material and aluminum particles is shown in Table 1.

[0050] Table 1 Example 1 result

[0051]

Embodiment 2

[0053] Take 50g of nickel-cobalt-manganese-manganate (NCM) positive electrode strip scraps and crush them with a pulverizer until the pieces are about 5mm in size, add ethanol to the pulverizer according to the ratio of alcohol to positive strip scraps at a mass ratio of 5:1, soak for 40min, and then fully smash.

[0054] After filtering and drying the filter residue, sieve with a standard inspection sieve to obtain 7.1 g of positive electrode material powder collected under the sieve and aluminum particles remaining on the sieve.

[0055] Take 500 mL of 1.5 mol / L NaOH solution, wash and sieve the positive electrode material with this solution for 30 minutes, then let it stand until the solution is clear, decant the upper layer and floating matter, filter the bottom slurry, wash the filter cake with water, filter and dry That is, 41.1 g of a qualified positive electrode material was obtained. The recycling process is shown in Figure 4 , the composition of the recovered posi...

Embodiment 3

[0059] Take 50g of compound type (LCO:NCM=3:1) positive electrode scraps and crush them with a pulverizer until the pieces are about 5mm in size. Then fully pulverize.

[0060] After filtering and drying the filter residue, sieve with a standard inspection sieve to obtain 6.3g of positive electrode material powder collected under the sieve and aluminum particles left on the sieve.

[0061] Take 2.5mol / L of Na 2 CO 3 Solution 500mL, use this solution to wash the positive electrode material obtained by sieving for 30min, then let it stand until the solution is clear, decant the upper liquid and floating matter, filter the bottom slurry, wash the filter cake with water, filter and dry to obtain a qualified positive electrode material 42.5 g. The recycling process is shown in Figure 4 , the composition of the recovered positive electrode material and aluminum particles is shown in Table 3.

[0062] Table 3 Example 3 results

[0063]

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Abstract

The invention relates to a method for recycling positive electrode scraps of lithium-ion batteries, and belongs to the technical field of energy materials. The technical problem to be solved by the invention is to provide a method for recycling positive electrode scraps of lithium-ion batteries. The method comprises the steps of: immersing the leftover material of the positive electrode of the lithium-ion battery in an organic solvent, pulverizing after soaking, filtering, taking the filter residue, drying, and sieving to obtain the positive electrode material powder collected under the sieve and the powder left on the sieve. Aluminum particles; wash the positive electrode material powder with alkaline solution, let it stand, decant the upper liquid and floating matter to obtain the bottom slurry, filter the bottom slurry, wash the filter cake, and dry to obtain the positive electrode material. The method of the invention has short flow and simple operation, can reduce energy consumption and save resources; it does not bring in other particles that may affect battery performance, does not destroy the chemical structure of the material itself, and avoids high-cost secondary synthesis.

Description

technical field [0001] The invention relates to a method for recycling positive electrode scraps of lithium-ion batteries, and belongs to the technical field of energy materials. Background technique [0002] With the development of science and technology, people are looking for alternatives to fossil fuels, and the new energy industry has developed vigorously. Lithium-ion batteries, as a representative of the new energy industry, have also emerged as the times require. It has the advantages of high energy density, light weight, high working voltage, no memory effect, and long cycle life, so it is widely used as a power source for various mobile devices. [0003] With the upsurge of new energy development in recent years, coupled with policy guidance, lithium batteries, as the leader, have made great progress in technology and market, the industrial scale has expanded rapidly, and the output of lithium-ion batteries has surged. [0004] As the core component of lithium-ion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54B09B3/00C22B7/00
CPCH01M10/54C22B7/008B09B3/80Y02W30/84Y02P10/20
Inventor 曹乃珍高洁胡云龙徐川何霞
Owner 天齐锂业(江苏)有限公司
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