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Preparation method and application of a heteroatom-doped hierarchical porous carbon supercapacitor electrode material

A supercapacitor, hierarchical porous technology, applied in hybrid capacitor electrodes, carbon preparation/purification, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of unsatisfactory electrical properties of composite materials, single porous structure, etc., to promote storage and transfer, the preparation process is simple, and the effect of high yield

Active Publication Date: 2019-10-22
国容智能科技(南京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the porous structure prepared by this method is relatively simple, and the electrical properties of the obtained composite material are not ideal.

Method used

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  • Preparation method and application of a heteroatom-doped hierarchical porous carbon supercapacitor electrode material
  • Preparation method and application of a heteroatom-doped hierarchical porous carbon supercapacitor electrode material
  • Preparation method and application of a heteroatom-doped hierarchical porous carbon supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1.0gSiO2 (15nm) and 1.0gSiO 2 (100nm) was dispersed in 100mL deionized water, ultrasonically dispersed for 2 hours, and placed in a three-necked flask; then 17.52g of thiourea was added to the above solution, and after mechanical stirring for 0.5h, 6mL of formaldehyde and 0.4mL of hydrochloric acid solution were added, and the temperature was raised to 55 Continue to react for 3 hours at ℃ to obtain a milky white reaction solution, filter it with suction, wash with deionized water and ethanol, and dry to obtain a thiourea-formaldehyde resin;

[0033] Put 5 g of the above-mentioned thiourea-formaldehyde resin in a tube furnace, carbonize at 750°C for 3 hours under the protection of argon, and naturally cool to room temperature to obtain a heteroatom-doped carbon material;

[0034] Disperse 0.5 g of the above-mentioned heteroatom-doped carbon material in 0.2 mol / L sodium hydroxide solution and etch at 80° C. for 10 h to obtain a heteroatom-doped hierarchical porous carbon...

Embodiment 2

[0037] 1.5gSiO 2 (15nm) and 0.2gSiO 2 (100nm) was dispersed in 100mL deionized water, ultrasonically dispersed for 2 hours, and placed in a three-necked flask; then 17.52g of thiourea was added to the above solution, and after mechanical stirring for 0.5h, 6mL of formaldehyde and 0.4mL of hydrochloric acid solution were added, and the temperature was raised to 55 Continue to react for 3 hours at ℃ to obtain a milky white reaction solution, filter it with suction, wash with deionized water and ethanol, and dry to obtain a thiourea-formaldehyde resin;

[0038] Put 5 g of the above-mentioned thiourea-formaldehyde resin in a tube furnace, carbonize at 750°C for 3 hours under the protection of argon, and naturally cool to room temperature to obtain a heteroatom-doped carbon material;

[0039] Disperse 0.5 g of the above-mentioned heteroatom-doped carbon material in 0.2 mol / L sodium hydroxide solution and etch at 80° C. for 12 hours to obtain a heteroatom-doped hierarchical porous ...

Embodiment 3

[0045] 1.5gSiO 2 (15nm) and 0.2gSiO 2 (100nm) was dispersed in 100mL deionized water, ultrasonically dispersed for 2 hours, and placed in a three-necked flask; then 17.52g of thiourea was added to the above solution, and after mechanical stirring for 0.5h, 6mL of formaldehyde and 0.4mL of hydrochloric acid solution were added, and the temperature was raised to 55 Continue to react for 3 hours at ℃ to obtain a milky white reaction solution, filter it with suction, wash with deionized water and ethanol, and dry to obtain a thiourea-formaldehyde resin;

[0046] Place 5 g of the above thiourea-formaldehyde resin in a tube furnace, carbonize at 600°C for 3 hours under the protection of argon, and naturally cool to room temperature to obtain a heteroatom-doped carbon material;

[0047] Disperse 0.5 g of the above-mentioned heteroatom-doped carbon material in 0.2 mol / L sodium hydroxide solution and etch at 60°C for 12 hours to obtain a heteroatom-doped hierarchical porous carbon mat...

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Abstract

The invention relates to a preparation method and application of a heteroatom doping graded porous carbon supercapacitor electrode material. The preparation method comprises the following steps: first taking silica with different particle sizes as a template, dispersing the silica in 100mL of deionized water; then, dissolving thiourea and formaldehyde in a mixed solution, adjusting pH value with hydrochloric acid to react under a 55 DEG C condition for 3 hours; getting a milky white reaction solution, and after suction filtrating, washing and drying, obtaining thiourea aldehyde resin; then carbonizing at 750 DEG C for 3 hours to obtain a heteroatom doping carbon material; finally, placing the heteroatom doping carbon material in a 0.2mol / L sodium hydroxide solution at 80 DEG C to conduct mechanical erosion for 12 hours to obtain the heteroatom doping graded porous carbon supercapacitor electrode material. According to the preparation method and the application of the heteroatom doping graded porous carbon supercapacitor electrode material, the preparation is simple, the yield is high and controllability is provided; the prepared heteroatom doping graded porous carbon supercapacitor electrode material has the advantages of appropriate heteroatom doping, different pore size distribution, stable structure, excellent electrochemical performance, good rate capacity, high specific capacitance and the like, and is very suitable for being applied in the field of supercapacitors as an electrode material.

Description

technical field [0001] The invention belongs to the technical field of new energy electronic materials, and relates to a preparation method and application of a heteroatom-doped hierarchical porous carbon supercapacitor electrode material. Background technique [0002] As a traditional material with low price and various forms, carbon material has very important application value in various fields. Among them, in the application field of supercapacitor (SCs) electrode materials, carbon materials have been unanimously favored by the majority of researchers. Generally speaking, carbon materials exist in various forms, such as activated carbon, template carbon, carbon nanotubes, and polymer-based carbon, all of which have their own advantages and have been successfully applied in various fields. [0003] Polymer-based carbon material is a material obtained by high-molecular polymer-based material as a precursor after high-temperature carbonization. Although the electrochemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05H01G11/86H01G11/24H01G11/32
Inventor 李梅常成帅姜丰
Owner 国容智能科技(南京)有限公司