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Recovery method of lithium cobalt oxide waste battery

A recycling method and technology for waste batteries, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problem of high cost, achieve low cost, overcome low lithium recovery rate, and be easy to promote.

Active Publication Date: 2020-10-27
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a recovery method for lithium cobalt oxide waste batteries, which solves the problem of high cost of existing recovery methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 of the present invention provides a method for recycling lithium cobalt oxide waste batteries, specifically:

[0040] Put the lithium cobalt oxide waste battery into the brine and discharge it to a voltage of 0.05V, add the straw and the lithium cobalt oxide waste battery into the rotary kiln according to the mass ratio of 1:20, and conduct pyrolysis at a temperature of 400 ° C to obtain cobalt powder and Lithium oxide mixture;

[0041] After crushing and sorting the mixture, plastic, iron material, aluminum foil, copper foil and positive and negative electrode powder are obtained; the positive and negative electrode powder and pure water are slurried and washed in a ratio of 1:3, filtered and separated to obtain carbon hydroxide Lithium solution and carbon-containing cobalt powder; the lithium hydroxide solution is reacted with hydrochloric acid to obtain lithium chloride; the carbon-containing cobalt powder and sulfuric acid are mixed and reacted in a vol...

Embodiment 2

[0044] Embodiment 2 of the present invention provides a method for recycling lithium cobalt oxide waste batteries, specifically:

[0045] Put the lithium cobalt oxide waste battery into the brine and discharge it to a voltage of 0.12V, add the straw and the lithium cobalt oxide waste battery into the rotary kiln according to the mass ratio of 1:10, and conduct pyrolysis at a temperature of 500 ° C to obtain cobalt powder and Lithium oxide mixture;

[0046] After crushing and sorting the mixture, plastics, iron materials, aluminum foil, copper foil and positive and negative electrode powders are obtained; the positive and negative electrode powders and pure water are slurried and washed in a ratio of 1:4, filtered and separated to obtain carbon hydroxide Lithium solution and carbon-containing cobalt powder; the lithium hydroxide solution is reacted with hydrochloric acid to obtain lithium chloride; the carbon-containing cobalt powder and sulfuric acid are mixed and reacted in a...

Embodiment 3

[0049] Embodiment 3 of the present invention provides a method for recycling lithium cobalt oxide waste batteries, specifically:

[0050] Put the lithium cobalt oxide waste battery into the brine and discharge it to a voltage of 0.08V, add the straw and the lithium cobalt oxide waste battery into the rotary kiln according to the mass ratio of 3:20, and conduct pyrolysis at a temperature of 700 ° C to obtain cobalt powder and cobalt oxide waste battery. Lithium oxide mixture;

[0051] After crushing and sorting the mixture, plastic, iron material, aluminum foil, copper foil and positive and negative electrode powders are obtained; the positive and negative electrode powders and pure water are slurried and washed in a ratio of 1:5, filtered and separated to obtain carbon hydroxide Lithium solution and carbon-containing cobalt powder; the lithium hydroxide solution is reacted with hydrochloric acid to obtain lithium chloride; the carbon-containing cobalt powder and sulfuric acid ...

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PUM

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Abstract

The invention discloses a lithium cobalt oxide waste battery recovery method, which is specifically implemented according to the following steps: 1, performing biomass energy pyrolysis on a lithium cobalt oxide waste battery to obtain a mixture of cobalt powder and lithium oxide; 2, crushing and sorting the mixture obtained in the step 1 to obtain plastics, iron materials, aluminum foils, copper foils and positive and negative electrode powder; 3, carrying out slurrying washing on the positive and negative electrode powder obtained in the step 2, and carrying out filtering separation to obtaina hydrocarbon lithium oxide solution and carbon-containing cobalt powder; and 4, reacting the lithium hydroxide solution obtained in the step 3 with hydrochloric acid to obtain lithium chloride, mixing the carbon-containing cobalt powder obtained in the step 3 with sulfuric acid for reaction, and then performing concentration and crystallization to obtain cobalt sulfate crystals so as to completecyclic regeneration of the waste lithium cobalt oxide battery. According to the invention, the cyclic regeneration method of the waste lithium cobalt oxide battery is low in cost, short in technological process and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of battery material waste treatment, and in particular relates to a method for recycling lithium cobalt oxide waste batteries. Background technique [0002] New energy vehicles are the world's largest green industry, and the lithium-ion battery cathode material, which is the core of its power, accounts for 40% of the cost. In the manufacturing process of power batteries, a large number of substandard products will inevitably be produced. How to deal with substandard batteries? Recycling is one of the problems to be solved at present. [0003] In the prior art, the recycling of unqualified batteries is generally to add a reducing agent to leach cobalt, nickel, manganese, and lithium under acidic conditions, and then extract and separate and recover cobalt, nickel, and manganese. The lithium solution is precipitated with sodium carbonate or sodium phosphate to obtain carbonic acid. Lithium or Lithium Phosphat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C01G51/10
CPCC01G51/10H01M10/54Y02W30/84
Inventor 许开华余顺文苏陶贵王飞易庆平张云河张坤
Owner JINGMEN GEM NEW MATERIAL