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Method for recycling Co3O4 from positive electrode material of waste lithium cobalt oxide battery

A battery positive electrode and old lithium cobalt oxide technology, which is applied in the field of recycling waste lithium cobalt oxide battery positive electrode materials, can solve the problems of dust and heavy metal pollution, toxic and harmful gases, secondary pollution, etc., and achieve excellent material performance, stable chemical properties, Simple and easy to operate effect

Inactive Publication Date: 2016-02-17
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Judging from the disclosed prior art, the following problems still exist in the field of waste lithium-ion battery recycling: one is the leaching part, most of which use inorganic strong acids such as sulfuric acid, hydrochloric acid, nitric acid, etc., which will cause secondary pollution to the surrounding environment, And the energy consumption is large; the second is the calcination preparation process, which produces toxic and harmful gases during the calcination process, causing dust and heavy metal pollution

Method used

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  • Method for recycling Co3O4 from positive electrode material of waste lithium cobalt oxide battery
  • Method for recycling Co3O4 from positive electrode material of waste lithium cobalt oxide battery

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The spent LiCoO 2 The battery is broken and disassembled by hand, and the positive electrode sheet is taken out. Soak the above-mentioned positive electrode sheet in NMP solution, stir it mechanically for 10 min at room temperature with a solid-to-liquid ratio (g / ml) of 1:5, filter and dry to collect the black powder therein.

[0031] Take the black powder obtained in the separation stage, add citric acid for leaching, the amount of acid is 30g / l, add 1% H with a volume fraction of 1:1.5 2 o 2 , the solid-to-liquid ratio is controlled at 10g / l, stirred and leached at 30°C for 5h, and filtered to obtain a cobalt-containing filtrate.

[0032] Add tertiary carbon carboxylic acid Versatic911 to the filtrate and extract for 1 hour to obtain relatively pure Co ion complex.

[0033] After extraction, the cobaltate leaching liquid is sent into the roasting furnace through a pneumatic feeding device, and air is blown in, the temperature of the heating area of ​​the roasting f...

Embodiment 2

[0035] The spent LiCoO 2 The battery is broken and disassembled by hand, and the positive electrode sheet is taken out. Soak the above-mentioned positive electrode sheet in DMF solution, with a solid-to-liquid ratio (g / ml) of 1:15 at room temperature, with mechanical stirring for 30 minutes, filter and dry to collect the black powder therein.

[0036] Take the black powder obtained in the separation stage, add acetic acid for leaching, the amount of acid is 50g / l, add 1% H with a volume fraction of 1:2 2 o 2 , the solid-to-liquid ratio is controlled at 20g / l, stirred and leached at 60°C for 3h, and filtered to obtain a cobalt-containing filtrate.

[0037] Add bis(2-hydroxy-5-octyl)benzylamine to the filtrate and extract for 1 hour to obtain relatively pure Co ion complex.

[0038] After extraction, the cobaltate leaching liquid is sent to the roasting furnace through a pneumatic feeding device, and air is blown in to control the temperature of the heating area of ​​the roas...

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Abstract

The invention discloses a method for recycling Co3O4 from a positive electrode material of a waste lithium cobalt oxide battery. By means of an organic acid leaching method, the positive electrode material of the waste lithium cobalt oxide battery is obtained through separation, operation is simple, and the separation rate reaches more than 98%. Meanwhile, in the leaching process, the pollution to the environment is reduced by selecting organic acid. Zero pollution to the environment is achieved in the process of obtaining Co3O4 through spraying sintering, and operation is simple and feasible. An obtained product is stable in chemical property, the material performance is superior, and the product can serve as an electronic material and can also be widely applied to catalysts and oxidizing agents and applied to manufacturing cobalt salt, enamel pigment and the like.

Description

technical field [0001] The invention belongs to the field of recovery of positive electrode materials of waste lithium cobaltate batteries, in particular to a method for recovering Co from waste lithium cobaltate battery positive materials. 3 o 4 Methods. Background technique [0002] Today, with the continuous development of lithium-ion batteries, their applications are becoming more and more extensive. Due to the advantages of high charging voltage, large specific energy, long cycle life, good safety performance, no pollution, no memory effect, and small self-discharge, lithium-ion batteries have been widely used in the field of portable electronic products, including mobile phones, notebook computers, cameras , digital cameras, medical equipment, etc. The widespread use of lithium-ion batteries will inevitably bring a large number of waste batteries. Waste lithium-ion batteries contain a variety of inorganic and organic compounds, which will cause serious pollution to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00
CPCY02P10/20
Inventor 刘建文郑莹李敏平张阳阳宋鑫周来
Owner HUBEI UNIV
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