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Separation method of lithium cobalt oxide and aluminum foil on positive electrode sheet of scrap lithium ion battery

A lithium-ion battery and separation method technology, which is applied in the field of recycling of scrapped lithium-ion batteries, can solve the problems of high separation cost and water pollution, and achieve the effects of easy operation, low requirements, and no secondary pollution

Active Publication Date: 2016-01-27
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high separation cost and water pollution caused by the introduction of organic solvents into the water-based solvent in the separation process of lithium cobaltate and aluminum foil on the positive electrode sheet of the scrap lithium ion battery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: According to the ratio (g / ml) of the mass of the positive electrode sheet to the volume ratio of the ceramic crucible of 1:10, the positive electrode sheet is loaded into the ceramic crucible and placed in a box-type resistance furnace, starting from room temperature at 5°C / min Raise the temperature of the furnace to 500°C at a heating rate of 500°C, and then cut off the power of the box-type resistance furnace after holding the temperature for 0.5h, and cool it down to room temperature naturally. Take out the roasted positive electrode sheet, put the positive electrode sheet into a container filled with water according to the ratio of the mass of the positive electrode sheet to the volume of water of 1:50g / ml and stir for 15min with an electric stirrer at a stirring speed of 30r / min, The temperature of the water during stirring was 20°C. After the stirring was stopped, the contents in the container were sieved with a 10-mesh sieve, the aluminum foil on the s...

Embodiment 2

[0024] Example 2: According to the ratio (g / ml) of the mass of the positive electrode sheet to the volume ratio of the ceramic crucible of 1:10, the positive electrode sheet is loaded into the ceramic crucible and placed in a box-type resistance furnace, starting from room temperature at 7°C / min Raise the temperature of the furnace to 550°C at a certain rate of temperature rise, and then keep the furnace for 0.5 hours to cut off the power of the box-type resistance furnace and cool it down to room temperature naturally. Take out the roasted positive electrode sheet, put the positive electrode sheet into a container filled with water according to the ratio of the mass of the positive electrode sheet to the volume of water of 1:50g / ml and stir for 15min with an electric stirrer at a stirring speed of 30r / min, The temperature of the water during stirring was 20°C. After the stirring was stopped, the contents in the container were sieved with a 10-mesh sieve, the aluminum foil on ...

Embodiment 3

[0025] Example 3: According to the ratio (g / ml) of the mass of the positive electrode sheet to the volume ratio of the ceramic crucible of 1:10, the positive electrode sheet is loaded into the ceramic crucible and placed in a box-type resistance furnace, starting from room temperature at 5°C / min Raise the temperature of the furnace to 600°C at a certain heating rate, and then keep it warm for 0.5h, then cut off the power of the box-type resistance furnace, and cool it down to room temperature naturally. Take out the roasted positive electrode sheet, put the positive electrode sheet into a container filled with water according to the ratio of the mass of the positive electrode sheet to the volume of water of 1:60g / ml and stir for 15min with an electric stirrer at a stirring speed of 30r / min, The temperature of the water during stirring was 25°C. After the stirring was stopped, the contents in the container were sieved with a 10-mesh sieve, the aluminum foil on the sieve was was...

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Abstract

The separation method of lithium cobalt oxide and aluminum foil on the positive electrode sheet of the scrap lithium-ion battery, the steps are: discharge and disassemble the waste lithium-ion battery, and then put the waste positive electrode sheet into a box-type resistance furnace and bake it at 500~600°C , put the roasted positive electrode sheet into a container with water and stir it with an electric stirrer, then sieve the material in the container with a sieve, the sieve is aluminum foil, the sieve aluminum foil is washed with water, and dried naturally Aluminum foil is obtained; the undersize is a mixed solution containing positive active substances, the undersize is suction filtered, and the filtered oversize after natural drying is put into a ceramic crucible, and then placed in a box-type resistance furnace for high temperature treatment to obtain Lithium Cobalt Oxide. Compared with the prior art, the present invention has the advantages of easy operation, low requirement for separation equipment, high separation efficiency and low cost of lithium cobalt oxide and aluminum foil, no need to use any organic solvent in the treatment process, and no secondary pollution during the separation process.

Description

technical field [0001] The invention relates to the recycling technology of scrap lithium ion batteries. Background technique [0002] Lithium-ion batteries have a series of advantages such as small size, light weight, high energy density, high working voltage, long cycle life and no memory effect, and have been widely used in cameras, mobile phones, notebook computers, cameras, portable measuring instruments, charging In addition, it is also an optional high-energy power source for electric vehicles and energy storage power stations in the future. After the service life of lithium-ion batteries has expired, its subsequent reasonable treatment is an important issue to be solved. [0003] At present, the positive electrode sheet obtained after dismantling the scrapped lithium-ion battery generally needs to separate the active material lithium cobaltate on the positive electrode sheet from the aluminum foil as the base material before further processing. The first Chinese pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCH01M10/54C22B7/00B09B3/80Y02W30/84
Inventor 王大辉文豪
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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