Porous graphene material and preparation method thereof, capacitor electrode, capacitor and electromotive device

A technology of porous graphene and capacitor electrodes, which is applied in the field of graphene, can solve the problems that the performance cannot meet the needs of use, and achieve the effects of excellent cycle stability, high yield, and controllable specific surface area

Active Publication Date: 2021-12-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of carbon-based capacitor materials cannot meet the needs of use at present.

Method used

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  • Porous graphene material and preparation method thereof, capacitor electrode, capacitor and electromotive device
  • Porous graphene material and preparation method thereof, capacitor electrode, capacitor and electromotive device
  • Porous graphene material and preparation method thereof, capacitor electrode, capacitor and electromotive device

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preparation example Construction

[0056] According to the first aspect of the invention, a method of preparing a porous graphene material comprising the steps of:

[0057] (a) provide a mixture of coal tar and potassium carbonate;

[0058] (b) Calcination of the mixture of coal tar and potassium carbonate is calcined in a protective atmosphere to obtain a porous graphene material.

[0059] Coal tar is mainly a black or dark brown viscous liquid having irritating odor when the coal is dried, referred to as tar. Coal tar prices is low and rich in production, which uses it as a carbon source, which can greatly save production costs.

[0060] Potassium carbonate acts as a mild and environmentally friendly activator to activate the aperture during the calcination (carbonization) process of the coal tar, and exerts a hard template-oriented molding effect.

[0061] The preparation method is used as an activator and a template for potassium carbonate to prepare a porous graphene material by calcining the coal tar as a car...

Embodiment 1

[0092] This embodiment provides a method of preparing a porous graphene material comprising the steps of:

[0093] (a) provide a mixture of coal tar and potassium carbonate;

[0094] 1 g of coal tar was ground to the powder to be used in a mortar, and then 3 g of potassium carbonate was sufficiently polished in a mortar, ensuring that coal tar and potassium carbonate was mixed well to obtain a mixture of coal tar and potassium carbonate;

[0095](b) Transfer the mixture of coal tar and potassium carbonate to the rigid jade boat, at a level of 5 ° C / min at a level of 5 ° C / min to 800 ° C constant temperature 2h, then naturally fell to room temperature;

[0096] After the product obtained after the calcined product was cleaned, then washed to neutral with water, and then dried in a hem drying oven at 60 ° C for 8 h to give a porous graphene material.

Embodiment 2

[0098] This embodiment provides a method of preparing a porous graphene material, and the amount of potassium carbonate in step (a) is 4 g, the remaining raw materials, amounts, and the preparation method are the same as in Example 1.

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Abstract

The invention provides a porous graphene material, a preparation method thereof, a capacitor electrode, a capacitor and an electric device, and relates to the technical field of graphene. The preparation method of the porous graphene material uses potassium carbonate as an activator and a template, uses coal tar as a carbon source, mixes coal tar and potassium carbonate, and prepares a porous graphene material by calcining. The preparation method is environmentally friendly. , Simple, high yield, low equipment requirements, etc., the prepared porous graphene material has the characteristics of controllable specific surface area, well-developed pores, and thin sheets. The porous graphene material provided by the present invention is prepared by the above-mentioned preparation method. The structural characteristics of the porous graphene material make it possible to shorten the ion diffusion distance, facilitate the transmission of charges, and expose more adsorption sites. point, which is conducive to the further application of porous graphene materials. The present invention also provides a capacitor electrode, which is made of the above-mentioned porous graphene material.

Description

Technical field [0001] The present invention relates to the field of graphene, and more particularly to a porous graphene material and a preparation method thereof, a capacitor electrode, a capacitor, and an electric device. Background technique [0002] With the development of science and technology and the speed of life, people are increasingly strong for energy demand, and traditional fossil energy cannot meet people 's growing social life demand. Traditional fossil energy such as coal, oil, natural gas directly combines a large amount of emissions of greenhouse gas, which leads to problems such as global climate warming, sea level rise, so it is urgent to solve the problem. [0003] Currently clean energy has mainly lithium-ion batteries, lithium sulfur batteries, supercapacitors, etc. The problem leads to a low safety factor, so the application range is limited. The lithium sulfur battery has a higher energy density, attracting many researchers, but since the shuttle of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184H01G11/26H01G11/44H01G11/86
CPCC01B32/184H01G11/26H01G11/44H01G11/86C01B2204/22C01B2204/32
Inventor 吴明铂潘磊冯亮关露高才彭婷月邓文安
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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