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Preparation method of potassium carbonate chemically-activated low-order carbon source-based porous carbon

Potassium carbonate chemistry and potassium carbonate technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problem of underdeveloped porosity and graphitization degree, underdeveloped pore structure, and difficulty in meeting the requirements of high-performance electric double layer electrodes. Requirements on material porosity and degree of graphitization, etc., to achieve good application potential, easy to scale up production, and improve the effect of specific capacitance

Pending Publication Date: 2020-11-24
大唐可再生能源试验研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, coal or biomass-based porous carbon materials prepared by conventional physical activation or high-temperature carbonization processes have undeveloped pore structures (the specific surface area is generally lower than 1000m 3 / g), mostly amorphous carbon, which is difficult to meet the requirements of high-performance electric double layer electrode materials for porosity and graphitization degree
[0005] The present invention aims to solve the problems of underdeveloped porosity and graphitization degree of conventional coal or biomass-based porous carbon materials

Method used

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Examples

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Effect test

preparation example Construction

[0023] Potassium carbonate chemically activates the preparation method of low-order carbon source-based porous carbon of the present invention, it comprises the steps:

[0024] A. Process the low-order carbon source into powder and dry it. The low-order carbon source includes lignite, sub-bituminous coal, rice husk, bamboo powder, coconut shell, wood powder, leaves, lignin, and cellulose;

[0025] B, dissolving 2-5 parts by weight of potassium carbonate in water to obtain a solution of potassium carbonate, then adding 1 part by weight of the powdered low-order carbon source obtained in step A to the solution of potassium carbonate, and then mixing the powdered low-order carbon source The potassium carbonate solution of the carbon source is placed in a mixer and stirred evenly, and then the mixed solution is dried to obtain the mixture;

[0026] C. Put the mixture obtained in step B in the atmosphere furnace, and the atmosphere furnace is filled with nitrogen or argon, let the ...

Embodiment 1

[0039] Potassium carbonate chemically activates the preparation method of low-order carbon source-based porous carbon of the present invention, it comprises the steps:

[0040] A. Process low-order carbon source sub-bituminous coal into powder to obtain 80-100 mesh powdered coal powder, that is, powdery low-order carbon source;

[0041] B, 3 parts by weight of potassium carbonate are dissolved in water to obtain a solution of potassium carbonate, and then the powdered low-order carbon source obtained by adding 1 part by weight of step A to the solution of potassium carbonate is mixed with the powdered low-order carbon source The potassium carbonate solution was placed in a mixer and stirred evenly, and the rotation speed of the mixer was 300r / min, and then the mixed solution was dried at a drying temperature of 80°C and a drying time of 20h; the mixture was obtained;

[0042] C. Put the mixture obtained in step B in the atmosphere furnace, and the atmosphere furnace is filled ...

Embodiment 2

[0047] Potassium carbonate chemically activates the preparation method of low-order carbon source-based porous carbon of the present invention, it comprises the steps:

[0048] A. Process low-order carbon source sub-bituminous coal into powder to obtain 80-100 mesh powdered coal powder, that is, powdery low-order carbon source;

[0049] B, 3 parts by weight of potassium carbonate are dissolved in water to obtain a solution of potassium carbonate, and then the powdered low-order carbon source obtained by adding 1 part by weight of step A to the solution of potassium carbonate is mixed with the powdered low-order carbon source The potassium carbonate solution was placed in a mixer and stirred evenly, and the rotation speed of the mixer was 300r / min, and then the mixed solution was dried at a drying temperature of 80°C and a drying time of 20h; the mixture was obtained;

[0050] C. Put the mixture obtained in step B in the atmosphere furnace, and the atmosphere furnace is filled ...

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Abstract

The invention aims to provide a preparation method of potassium carbonate chemically-activated low-order carbon source-based porous carbon, which has the advantages of developed pores, relatively highgraphitization degree, simple preparation process and obvious graphitization structure, and can be applied to the field of electrochemical energy storage such as electrode materials of electric double-layer supercapacitors. The preparation method of the potassium carbonate chemically-activated low-order carbon source-based porous carbon comprises the following steps: a low-order carbon source isprocessed into powder, and drying is conducted; 2-5 parts by weight of potassium carbonate is dissolved in water, a potassium carbonate solution is obtained, then 1 part by weight of the powdery low-order carbon source obtained in the step A is added into the potassium carbonate solution, and the potassium carbonate solution mixed with the powdery low-order carbon source is placed in a stirrer tobe stirred evenly, and a mixture is obtained. The mixture obtained in the step B is placed in an atmosphere furnace filled with nitrogen or argon, heating is conducted by the atmosphere furnace at a rate of 3-20 DEG C / min, and the atmosphere furnace heats to 900-1300 DEG C.

Description

technical field [0001] The invention relates to a preparation method of potassium carbonate chemically activated low-order carbon source-based porous carbon. Background technique [0002] Compared with conventional chemical batteries, supercapacitors have the advantages of long service life, high power density, fast charge and discharge rate, and wide operating temperature limit. They have a wide range of applications in solar energy, wind power generation, new energy vehicles, and smart grids. Electrode materials are the key components of supercapacitors, mainly carbon-based materials, transition metal oxides and polymers. [0003] According to the calculation formula of supercapacitor specific capacitance, power and energy C=εA / d, E=1 / 2CV 2 and P=U 2 / R (C is the specific capacitance, ε is related to the conductivity of the material, A is the specific surface area, d is the interlayer spacing, U is the working voltage of the electrolyte), it can be concluded that the spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324C01B32/318C01B32/205H01G11/24H01G11/44
CPCC01B32/348C01B32/318C01B32/324C01B32/205H01G11/24H01G11/44Y02E60/13
Inventor 王丽杰苗继春高伟郭鹏曹善桥李森
Owner 大唐可再生能源试验研究院有限公司
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