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A method for preparing activated carbon for supercapacitors by using acid residue pitch

A technology of acid residue pitch and super capacitor, applied in chemical instruments and methods, hybrid capacitor electrodes, carbon compounds, etc., can solve the problems of high price and low specific surface area of ​​graphene, and achieve the effect of reducing pollution

Active Publication Date: 2020-07-10
佛山市光烨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of low specific surface area of ​​existing ordinary activated carbon and high price of graphene, the purpose of the present invention is to provide a method for preparing activated carbon for supercapacitors by using acid residue pitch, thereby providing a method for preparing activated carbon with high specific surface area at low cost

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  • A method for preparing activated carbon for supercapacitors by using acid residue pitch

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Embodiment 1

[0031] This embodiment relates to a method for preparing activated carbon for supercapacitors using acid slag pitch, which specifically includes the following steps:

[0032] Step (1): crush the acid residue asphalt, and screen the acid residue asphalt powder with a particle size of 300-500 mesh;

[0033] Step (2): According to the ratio of acid residue asphalt powder: lye = 1:1, the acid residue asphalt powder is mixed in a 50% potassium hydroxide aqueous solution, and dispersed and homogeneously emulsified to obtain acid residue asphalt Emulsions with lye;

[0034] Step (3): Drying: Put the emulsion into the activation furnace, heat up to 120°C at a rate of 5°C / min, keep it warm for 40 minutes, dry and dehydrate; carbonization activation: under the protection of nitrogen, continue to heat up at 5°C / min Raise the temperature to 900°C at a certain rate, keep it warm for 6 hours, and cool down after completing carbonization and activation;

[0035] Step (4): Wash the activate...

Embodiment 2

[0038] This embodiment relates to a method for preparing activated carbon for supercapacitors using acid slag pitch, which specifically includes the following steps:

[0039] Step (1): crush the acid residue asphalt, and screen the acid residue asphalt powder with a particle size of 300-500 mesh;

[0040] Step (2): According to the ratio of acid residue asphalt powder: lye = 1:2, the acid residue asphalt powder is mixed in potassium hydroxide aqueous solution with a mass fraction of 50%, and dispersed, homogeneous and emulsified to obtain acid residue Emulsions of bitumen and lye;

[0041] Step (3): Drying: Put the emulsion into the activation furnace, heat up to 140°C at a rate of 20°C / min, keep it warm for 30 minutes, dry and dehydrate; carbonization activation: under the protection of nitrogen, continue to heat up at 20°C / min Raise the temperature to 600°C at a certain rate, keep the temperature for 6 hours, and cool down after carbonization and activation;

[0042] Step ...

Embodiment 3

[0045] This embodiment relates to a method for preparing activated carbon for supercapacitors using acid slag pitch, which specifically includes the following steps:

[0046] Step (1): crush the acid residue asphalt, and screen the acid residue asphalt powder with a particle size of 300-500 mesh;

[0047] Step (2): According to the ratio of acid residue pitch powder: lye = 1:1, mix the acid residue pitch powder in saturated potassium carbonate solution, disperse and homogeneously emulsify, and obtain the emulsion of acid residue pitch and lye turbid liquid;

[0048] Step (3): Drying: Put the emulsion into the activation furnace, heat up to 160°C at a rate of 10°C / min, keep it warm for 40 minutes, dry and dehydrate; carbonization activation: under the protection of nitrogen, continue to heat up at 10°C / min Raise the temperature to 700°C at a certain rate, keep the temperature for 7 hours, and cool down after carbonization and activation;

[0049]Step (4): Wash the activated p...

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Abstract

The invention provides a method for preparing super capacitor active carbon by utilizing acid sludge pitch. The method comprises the following steps that acid sludge pitch is smashed to obtain acid sludge pitch powder; the acid sludge pitch powder is placed in a basic solution to be mixed, the mixture is subjected to dispersion, homogenizing and emulsifying, and emulsion of the acid sludge pitch and the basic solution is obtained; the emulsion is placed into an activating oven to be dried and dehydrated, and then carbonized and activated at the high temperature and under protection of nitrogen; the activated product is washed till to be neutral, and then subjected to vacuum rotation drying, and the super capacitor active carbon is obtained. The acid sludge pitch being taken as the raw material is cheap and easy to get, and can be reused, and thus the pollution of the acid sludge pitch to the environment can be reduced. The acid sludge pitch has the rich acidic functional groups, and has the good polarity, the acid sludge pitch particles can be in contact with the basic solution in the nano size in the homogeneous emulsion, the mass transferring resistance is overcome, and thus theactivation process can be operated evenly.

Description

technical field [0001] The invention relates to a method for preparing activated carbon for supercapacitors, in particular to a method for preparing activated carbon for supercapacitors by utilizing acid residue pitch. Background technique [0002] Supercapacitors are different from traditional chemical power sources. They are a power source with special properties between traditional capacitors and batteries. The basic principle is the same as other types of electric double layer capacitors. They are composed of activated carbon porous electrodes and electrolytes. The electric double layer structure obtains super large capacity. The outstanding advantages are high power density, short charge and discharge time, long cycle life, and wide operating temperature range. It is the largest capacity among the electric double layer capacitors that have been put into mass production in the world. The energy storage process of the shock capacitor does not undergo chemical reactions, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318C01B32/348H01G11/44H01G11/24
CPCC01B32/318C01B32/348H01G11/24H01G11/44Y02E60/13
Inventor 袁勇雷冲天
Owner 佛山市光烨环保科技有限公司
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