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Recovery method of activated carbon, electric double-layer capacitor comprising activated carbon recovered by method and preparation method of electric double-layer capacitor

A technology of electric double layer capacitors and recycling methods, which is applied in the manufacture of hybrid/electrical double layer capacitors, electrodes for hybrid capacitors, chemical instruments and methods, etc., can solve the problem of unsuitable industrial production, high production costs, and difficulty in reducing product prices. and other problems, to achieve the effect of high energy density, uniform mixing, beneficial to large-scale harmless treatment

Active Publication Date: 2021-03-12
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process, there are still disadvantages such as high production cost and not suitable for industrial production.
Because of this, it is difficult to reduce the price of activated carbon and its energy storage components for electric double layer capacitors.

Method used

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  • Recovery method of activated carbon, electric double-layer capacitor comprising activated carbon recovered by method and preparation method of electric double-layer capacitor
  • Recovery method of activated carbon, electric double-layer capacitor comprising activated carbon recovered by method and preparation method of electric double-layer capacitor
  • Recovery method of activated carbon, electric double-layer capacitor comprising activated carbon recovered by method and preparation method of electric double-layer capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 10kg of masks containing activated carbon in an oxidation stabilization furnace, heat them up to 300°C at a heating rate of 0.5°C / min, pass in air at a flow rate of 0.5L / min, and treat at a constant temperature for 12 hours. Then, under the nitrogen protection atmosphere of the high-temperature carbonization furnace, the temperature was raised to 800° C. for 6 hours at a heating rate of 2° C. / min. After naturally cooling to room temperature, it was transferred to an activation furnace, heated to 850 °C at a heating rate of 2 °C / min, and CO was introduced at a flow rate of 1 L / min. 2 The gas was activated for 6h to obtain 1.5kg of product.

[0031] After naturally cooling to room temperature, 1.5kg of the product was added to a 1M KOH solution for alkali washing, filtered and then transferred to a 0.5M HCl solution for acid washing. After filtration, the above materials were transferred to deionized water for washing. After repeating the above process 3 times, the ...

Embodiment 2

[0034] Put 15kg of masks containing activated carbon in an oxidation stabilization furnace, heat them up to 250°C at a heating rate of 0.2°C / min, feed air at a flow rate of 1.0L / min, and treat at a constant temperature for 20h. Then, under the nitrogen protection atmosphere of the high-temperature carbonization furnace, the temperature was raised to 800° C. for 12 hours at a heating rate of 3° C. / min. After naturally cooling to room temperature, it was transferred to an activation furnace, heated to 850 °C at a heating rate of 2 °C / min, and CO was introduced at a flow rate of 1 L / min. 2 The gas was activated for 12 hours to obtain 3.2kg of product.

[0035] After naturally cooling to room temperature, 3.2kg of the product was added to a 1.0M KOH solution for alkali washing, filtered and then transferred to a 1.0M HCl solution for acid washing. After filtration, the above materials were transferred to deionized water for washing. After repeating the above process 3 times, the...

Embodiment 3

[0038] Put 12kg of masks containing activated carbon in an oxidation stabilization furnace, heat it to 350°C at a heating rate of 0.2°C / min, feed air at a flow rate of 1.5L / min, and treat at a constant temperature for 24h. Then, under the nitrogen protection atmosphere of the high-temperature carbonization furnace, the temperature was raised to 750° C. for 12 hours at a heating rate of 3° C. / min. After naturally cooling to room temperature, it was transferred to an activation furnace, heated to 900 °C at a heating rate of 1 °C / min, and CO was introduced at a flow rate of 0.5 L / min. 2 The gas was activated for 12 hours to obtain 3.0kg of product.

[0039] After naturally cooling to room temperature, 3.0kg of the product was added to a 0.5M KOH solution for alkaline washing, filtered and then transferred to a 1.0M HCl solution for acid washing. After filtration, the above materials were transferred to deionized water for washing. After repeating the above process 3 times, the ...

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Abstract

The invention relates to a recovery method of activated carbon, an electric double-layer capacitor comprising the activated carbon recovered by the method and a preparation method of the electric double-layer capacitor, and belongs to the field of capacitor preparation. The recovery method comprises the following steps: putting mouth masks containing activated carbon into an oxidation stabilization furnace for stabilization treatment, then carrying out carbonization treatment in a high-temperature carbonization furnace at 700-850 DEG C, then carrying out activation treatment in an oxidizing atmosphere of CO2 or O3, then carrying out circular rinsing, then carrying out purification treatment in a vacuum carbonization furnace at 800-1000 DEG C, and finally, conducting recycling to obtain theactivated carbon after airflow crushing and grading treatment. The method for obtaining the activated carbon for the low-cost electric double-layer capacitor by using the activated carbon mask is realized, activated carbon slurry is stably and uniformly mixed by gradually reducing the solid content of the slurry, the cylindrical electric double-layer capacitor with high energy density and high power is formed, the whole preparation process is simple, large-scale production can be realized, and large-scale harmless treatment of disposable masks is facilitated.

Description

[0001] field of invention [0002] The invention relates to a method for recovering activated carbon, an electric double layer capacitor comprising activated carbon recovered by the method and a preparation method thereof, belonging to the field of capacitor preparation. Background technique [0003] As a new type of energy storage device, the electric double layer capacitor has high power density (can realize charging in seconds), long service life (the service life can be more than 10 years), and good temperature characteristics (the temperature of the product between -40°C and 65°C There is basically no difference in electrochemical properties), green and environmental protection, making it the core power core in the fields of rail transit, wind power generation, smart four-meter and military industry. As the core energy storage material of electric double-layer capacitors, activated carbon not only carries the energy storage and release functions of the device, but also it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/36C01B32/324H01G11/34H01G11/86
CPCC01B32/336C01B32/36C01B32/324H01G11/34H01G11/86Y02E60/13
Inventor 阮殿波屠建飞方志梅
Owner NINGBO UNIV
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