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A device and method for self-activating and recovering porous carbon from supercapacitor waste electrode slurry

A supercapacitor and electrode slurry technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of specific surface area decline, environmental impact, electrode material waste, etc., and achieve high specific surface area, large pore volume, The effect that the recycling method is simple

Active Publication Date: 2022-04-01
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment method of waste electrode slurry is mainly to use the sedimentation tank to remove the sediment (porous carbon and binder) in the slurry. Due to the action of the binder, the porous carbon is united, and the specific surface area is reduced by 30%. Therefore, the sediment needs to be disposed of by burying or burning, which has a certain impact on the environment and causes a waste of electrode materials.
[0003] Chinese patent (publication number 106207267A) discloses a lithium-ion battery cathode waste slurry recovery system and recovery method, although it is related to the recovery process of waste slurry, but it is aimed at the recovery and storage of lithium-ion battery cathode materials, not Electrode material recycling for supercapacitors

Method used

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  • A device and method for self-activating and recovering porous carbon from supercapacitor waste electrode slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Open the waste material inlet valve (9), place the waste electrode slurry containing activated carbon and binder in the horizontal reactor (1), the waste electrode slurry that enters accounts for 2 / 3 of the volume of the horizontal reactor, and then close the inlet waste valve (9);

[0039] Open the inlet valve (5) and outlet valve 2 (7) in sequence, pass in nitrogen inert gas for 15 minutes, the inert gas flow rate is 1.5L / min, and then close the inlet valve (5) and outlet valve 2 (7) in sequence;

[0040] Turn on the traction motor, the traction motor drives the stirring paddle (2) to rotate, so that the stirring speed reaches 1200r / min, after stirring for 0.5h, heat the horizontal reaction furnace (1) to 120°C at a speed of 8°C / min, and keep it warm for 2h; Then heat the horizontal reactor (1) to 800°C at a speed of 3°C / min, keep it warm for 2h, and then turn off the heating device;

[0041] Simultaneously open the inlet valve (5), outlet valve 1 (6) and outlet valv...

Embodiment 2

[0045] Open the waste material inlet valve (9), place the waste electrode slurry containing activated carbon and binder in the horizontal reactor (1), the waste electrode slurry that enters accounts for 2 / 3 of the volume of the horizontal reactor, and then close the inlet waste valve (9);

[0046] Open the inlet valve (5) and outlet valve 2 (7) in turn, pass in nitrogen inert gas for 10 minutes, the inert gas flow rate is 1L / min, and then close the inlet valve (5) and outlet valve 2 (7) in sequence;

[0047] Turn on the traction motor, the traction motor drives the stirring paddle (2) to rotate, so that the stirring speed reaches 900r / min, after stirring for 0.5h, heat the horizontal reaction furnace (1) to 100°C at a speed of 1°C / min, and keep it warm for 1h; Then heat the horizontal reactor (1) to 700°C at a speed of 1°C / min, keep it warm for 1h, and then turn off the heating device;

[0048] Simultaneously open the inlet valve (5), outlet valve 1 (6) and outlet valve 2 (7), ...

Embodiment 3

[0052] Open the waste material inlet valve (9), place the waste electrode slurry containing activated carbon and binder in the horizontal reactor (1), the waste electrode slurry entering accounts for 3 / 5 of the volume of the horizontal reactor, then close the inlet waste valve (9);

[0053] Open the inlet valve (5) and outlet valve 2 (7) in sequence, pass in nitrogen inert gas for 20 minutes, the inert gas flow rate is 2L / min, and then close the inlet valve (5) and outlet valve 2 (7) in sequence;

[0054] Turn on the traction motor, and the traction motor drives the stirring paddle (2) to rotate, so that the stirring speed reaches 1500r / min. After stirring for 1 hour, heat the horizontal reaction furnace (1) to 110°C at a speed of 10°C / min, and keep it warm for 3h; Heat the horizontal reactor (1) to 900°C at a rate of 10°C / min, keep it warm for 3 hours, and then turn off the heating device;

[0055] Open the inlet valve (5), outlet valve 1 (6) and outlet valve 2 (7) at the sa...

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Abstract

The invention relates to a device and a method for self-activating and recovering porous carbon from supercapacitor waste electrode slurry. The method for recovering porous carbon comprises the following steps: opening the waste inlet valve, placing the waste electrode slurry in a horizontal reaction furnace, closing the waste inlet valve; opening the inlet valve and the outlet valve, passing inert gas, and then closing the inlet valve Valve and outlet valve; turn on the traction motor, drive the stirring paddle to stir, then heat the horizontal reactor to 100-120°C, keep it warm for 1-3h, then heat it to 700-900°C, keep it warm for 1-3h, then stop heating; open Inlet valve and outlet valve, pass inert gas, and then close the inlet valve and outlet valve, so that the horizontal reactor will naturally drop to room temperature; open the water inlet valve, outlet valve and outlet pump to collect materials, and the solution has no black After solidification, close the water inlet valve, discharge valve and discharge pump; after the collected materials are filtered, solid black porous carbon powder is obtained.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a device and method for self-activating waste electrode slurry of supercapacitors and recovering porous carbon. Background technique [0002] Supercapacitors are widely used due to their advantages of ultra-high power, ultra-long life, and ultra-wide high and low temperature characteristics. The electrode of a supercapacitor is formed by physically dispersing porous carbon, binder and water into an electrode slurry and then uniformly coating it on an aluminum foil. material. At present, the treatment method of waste electrode slurry is mainly to use the sedimentation tank to remove the sediment (porous carbon and binder) in the slurry. Due to the action of the binder, the porous carbon is united, and the specific surface area is reduced by 30%. Therefore, the sediment needs to be disposed of by burying or burning, which has a certain impact on the environment and causes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/36C01B32/39
CPCC01B32/36C01B32/39C01P2006/12C01P2006/14
Inventor 乔志军阮殿波于学文丁升
Owner NINGBO CRRC NEW ENERGY TECH CO LTD