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Preparation method and application of porous carbon material

A technology of porous carbon materials and products, which is applied in the field of preparation of porous carbon materials, can solve the problem that carbon materials are difficult to have a multi-level pore structure, and achieve the effects of good electrochemical performance, abundant raw material sources, and large pore volume

Inactive Publication Date: 2016-08-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials prepared by conventional activation methods are difficult to have the characteristics of hierarchical porous structure

Method used

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  • Preparation method and application of porous carbon material
  • Preparation method and application of porous carbon material
  • Preparation method and application of porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 10g of potassium acetate and put it in a nickel crucible, place it in a high temperature quartz tube furnace under the protection of Ar flow (gas flow rate is 40mL / min), raise the temperature to 800°C at a heating rate of 5°C / min, and maintain it for 1.5h Natural cooling, black composite carbon material is obtained after pyrolysis, and then an excess of 10% HNO is added 3 (v / v) solution, immerse the composite carbon material, set the rotating speed at 500r / min, magnetically stir for 3h, then wash with a large amount of deionized water until neutral, and vacuum dry at 80°C for 18h to obtain the porous carbon material.

[0025] The test method to use it for supercapacitor electrode material is:

[0026] Firstly, the porous carbon material is ground into a powder with a particle size of less than 30 μm by an agate mortar, and the above-mentioned porous carbon, acetylene black and polyvinylidene fluoride (Poly(vinylidene fluoride), PVDF) are weighed according to a mas...

Embodiment 2

[0029] Weigh 10g of potassium acetate and put it in a nickel crucible, place it in a high temperature quartz tube furnace under N 2 Under the protection of air flow (gas flow rate is 20mL / min), the temperature was raised to 700°C at a heating rate of 3°C / min, kept for 3h, then cooled naturally, and a black composite carbon material was obtained after pyrolysis, and then an excess of 5% HCl was added (v / v) solution, immerse the composite carbon material, set the rotation speed at 1000r / min, magnetically stir for 2h, then wash with a large amount of deionized water until neutral, and vacuum dry at 60°C for 24h to obtain a porous carbon material.

[0030] It was used for electrochemical test, and the specific capacitance was 96.4F / g at a current density of 1A / g.

Embodiment 3

[0032] Weigh 10g of potassium acetate and put it in a nickel crucible, place it in a high temperature quartz tube furnace under N 2 Under the protection of air flow (gas flow rate of 100mL / min), the temperature was raised to 900°C at a heating rate of 8°C / min, maintained for 0.5h and then cooled naturally. After pyrolysis, a black composite carbon material was obtained, and then an excess of 7% HCl ( v / v) solution, immerse the composite carbon material, set the rotating speed to 200r / min, magnetically stir for 6h, then wash with a large amount of deionized water until neutral, and vacuum dry at 110°C for 6h to obtain a porous carbon material.

[0033] It was used for electrochemical test, and the specific capacitance was 102.9F / g at a current density of 1A / g.

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Abstract

The invention provides a preparation method and application of a porous carbon material. The preparation method is carried out according to the following steps of placing potassium acetate in a nickel crucible, placing the nickel crucible in a high-temperature quartz tubular furnace, carrying out high-temperature pyrolysis under the protection of an inert gas, obtaining a product after pyrolysis, removing impurities in the product with an acid solution, immersing the product in the acid solution for magnetic stirring, washing the product with a large amount of deionized water to a neutral condition, and carrying out vacuum drying to obtain the porous carbon material. The prepared material is favorable in porous structure, high in specific area, large in pore volume and favorable in electrochemical performance, and also can be applied to other aspects.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, and in particular relates to a preparation method of a porous carbon material. Background technique [0002] Today, the rapid development of the global economy has caused serious environmental problems and caused excessive consumption of fossil fuels, which poses an incomparable threat to human survival and development. Therefore, the development of sustainable clean energy and efficient energy conversion and storage technologies is a great challenge in this century. As a unique electrical energy storage device, supercapacitor (also known as electrochemical capacitor) is an important bridge connecting traditional dielectric capacitors and batteries, so it has received more and more attention worldwide in recent years. Supercapacitors can provide The energy density is several orders of magnitude higher than that of traditional dielectric capacitors, and it has grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/44H01G11/24H01G11/86
CPCY02E60/13H01G11/44H01G11/24H01G11/86
Inventor 何劲松戴江栋谢阿田田苏君张瑞龙常忠帅闫永胜
Owner JIANGSU UNIV
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