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Method for regenerating graphene by recovering waste lithium ion battery

A lithium-ion battery, recycled graphite technology, applied in battery recycling, waste collector recycling, secondary batteries, etc., can solve problems such as infeasibility, no special treatment of lithium-carbon compounds, etc., achieve excellent properties, and is conducive to perfecting and The effect of diversification, strong application prospects and feasibility

Active Publication Date: 2013-08-21
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned patents have certain characteristics in their respective recycling technologies, they do not have special treatment for lithium-carbon compounds after charging and discharging. At the same time, the recycling method is to first take out the negative plate and then recycle, which is not applicable in industrial applications. It is not feasible, and the precise separation and recovery of different components in the integrated recovery process of lithium-ion batteries will be an important issue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Discharge the recovered soft-packed lithium cobaltate / graphite battery to 0V, clean the surface of the battery with ethanol, cut it into several pieces with a mechanical cutter, put them into dimethyl carbonate (DMC) for ultrasonic vibration filtration, and remove the concentrated Remove the fluid, isolation film, tabs and packaging bags to obtain the coating slurry; filter again to remove the liquid components to obtain a filter cake, and dry at 45°C under a pressure of 1 KPa to obtain a blended powder of positive and negative active materials , and then pulverize the blended powder of positive and negative active materials for 20 min. After that, through the airflow separation tube, under the action of gravity and airflow blowing force, the denser lithium cobalt oxide sinks and the lower density graphite floats up to realize the separation of the two, and recover the intercalated graphite material;

[0026] Take 20 g of the obtained intercalated graphite, add 10 g of ...

Embodiment 2

[0028]Discharge the recovered soft-packed lithium cobaltate / graphite battery to 3V, clean the surface of the battery with ethanol, cut it into several pieces with a mechanical cutter, put them into dimethyl carbonate (DMC) for ultrasonic vibration filtration, and remove the collected Remove the fluid, isolation film, tabs and packaging bags to obtain the coating slurry; filter again to remove the liquid components to obtain a filter cake, dry at 200°C and 30 KPa to obtain the blended powder of positive and negative active materials , and then pulverize the blended powder of positive and negative active materials for 10 min. After that, through the airflow separation tube, under the action of gravity and airflow blowing force, the denser lithium cobalt oxide sinks and the lower density graphite floats up to realize the separation of the two, and recover the intercalated graphite material;

[0029] Take 20 g of the obtained intercalated graphite, add 10 g of sodium nitrate, 400 ...

Embodiment 3

[0031] Discharge the recovered soft-pack lithium cobalt oxide / graphite battery to 1.0 V, clean the surface of the battery with ethanol, cut it into several pieces with a mechanical cutter, put it into acetone for ultrasonic vibration filtration, and clean the current collector, isolation film, Remove the tabs and packaging bags to obtain the coating slurry; filter again to remove the liquid components in it to obtain a filter cake, dry at 500°C and 30 KPa pressure to obtain a blended powder of positive and negative active materials, and then pulverize the positive and negative Active material blended powder for 30 min. After that, through the airflow separation tube, under the action of gravity and airflow blowing force, the denser lithium cobalt oxide sinks and the lower density graphite floats up to realize the separation of the two, and recover the intercalated graphite material;

[0032] Take 20 g of the obtained intercalated graphite, add 10 g of sodium nitrate, 400 mL of...

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Abstract

The invention discloses a method for regenerating graphene by recovering a waste lithium ion battery. The method is characterized by comprising the following steps of: S1, recovery of an active substance of a battery electrode: carrying out pre-charge or pre-discharge treatment on the waste lithium ion battery which takes graphite as an anode material, and then separating a cathode coating and an anode coating from a current collector and an outer package to obtain a cathode and anode blending material; S2, separation of an intercalated graphite electrode material: drying and crushing the cathode and anode blending material, and separating the active substances of a positive electrode and a negative electrode by adopting a physical method to obtain intercalated graphite powder; and S3, preparation of graphene from the intercalated graphite powder: preparing the graphene by an oxidation-reduction method or an ultrasonic stripping method based on the intercalated graphite powder as a raw material. After the method is adopted, the industrial recovery of the lithium ion battery is realized, and a graphene material can be regenerated by a graphite anode with high added value, so that the method has better application prospect and feasibility, and can produce greater economic benefit and social benefit.

Description

technical field [0001] The invention relates to the field of recycling waste batteries, in particular to a method for recycling and regenerating graphene from waste lithium ion batteries. Background technique [0002] With the increasingly prominent energy and environmental issues, the development of new energy has become a major trend of energy strategy. Energy storage and conversion devices play a very important role in the development of new energy strategies. In particular, after nearly 20 years of development, lithium-ion batteries have become an indispensable secondary power supply in people's lives due to their excellent performance, and occupy a dominant position in the power supply of electronic consumer products such as mobile phones and computers. With the rapid development of power vehicles, power lithium-ion batteries have also ushered in a huge opportunity for development, and their usage and scale are constantly increasing. The huge usage of lithium-ion batt...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M10/0525H01M10/058
CPCY02E60/10Y02W30/84Y02P70/50
Inventor 杨全红张辰游从辉魏伟吕伟李宝华康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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