Composite activated carbon aerogel as well as preparation method and application thereof

A technology of composite activated carbon and aerogel, applied in aerogel preparation, chemical instruments and methods, colloid chemistry, etc. Chemical properties, effect of avoiding degradation processes

Active Publication Date: 2020-01-10
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of cellulose carbon aerogels is generally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] A cellulose / carbon nanotube carbon aerogel. The preparation method includes the following steps:

[0052] 1) Disperse 2.5 g of carbon nanotubes in an ionic liquid solvent to form a cellulose solvent, dissolve 4 g of bamboo cellulose pulp in 93.5 g of cellulose solvent, and stir at 500r / min for 6 hours at 55°C. With 200w power and ultrasonic degassing at 55°C for 20h, regenerated cellulose / carbon nanotube sol is obtained;

[0053] Wherein, the cation in the ionic liquid solvent is alkylimidazolium ion, and the anion is CF 3 COO - ;

[0054] 2) Solvent replacement for the regenerated cellulose / carbon nanotube sol, the deionized water immersion time is 20h, the deionized water is changed every 5h, the tert-butanol immersion time is 20h, and the tert-butanol is replaced every 5h. After that, freeze-drying was performed under the conditions of a temperature of -45°C and a degree of vacuum of 60 Pa.

[0055] 3) Carry out high-temperature carbonization under the con...

Example Embodiment

[0057] Example 2

[0058] A cellulose / carbon nanotube carbon aerogel. The preparation method includes the following steps:

[0059] 1) Disperse 2.5 g of carbon nanotubes in an ionic liquid solvent to form a cellulose solvent, dissolve 6 g of bamboo cellulose pulp in 91.5 g of cellulose solvent, and stir at 500r / min for 6 hours at 55°C. With 200w power and ultrasonic degassing at 55°C for 20h, regenerated cellulose / carbon nanotube sol is obtained;

[0060] Wherein, the cation in the ionic liquid solvent is alkylimidazolium ion, and the anion is CF 3 COO - ;

[0061] 2) Solvent replacement for the regenerated cellulose / carbon nanotube sol, the deionized water immersion time is 20h, the deionized water is changed every 5h, the tert-butanol immersion time is 20h, and the tert-butanol is replaced every 5h. After that, freeze-drying was performed under the conditions of a temperature of -45°C and a degree of vacuum of 60 Pa.

[0062] 3) Carry out high-temperature carbonization under the con...

Example Embodiment

[0064] Example 3

[0065] A cellulose / carbon nanotube carbon aerogel. The preparation method includes the following steps:

[0066] 1) Disperse 2.5 g of carbon nanotubes in an ionic liquid solvent to form a cellulose solvent, dissolve 8 g of bamboo cellulose pulp in 89.5 g of cellulose solvent, and stir at 500r / min for 6 hours at 55°C. With 200w power and ultrasonic degassing at 55°C for 20h, regenerated cellulose / carbon nanotube sol is obtained;

[0067] Wherein, the cation in the ionic liquid solvent is alkylimidazolium ion, and the anion is CF 3 COO - ;

[0068] 2) Solvent replacement for the regenerated cellulose / carbon nanotube sol, the deionized water immersion time is 20h, the deionized water is changed every 5h, the tert-butanol immersion time is 20h, and the tert-butanol is replaced every 5h. After that, freeze-drying was performed under the conditions of a temperature of -45°C and a degree of vacuum of 60 Pa.

[0069] 3) Carry out high-temperature carbonization under the con...

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Abstract

The invention relates to the technical field of carbon materials, in particular to composite activated carbon aerogel as well as a preparation method and application thereof. According to the method,cellulose pulp and carbon nanotubes are used as raw materials, and the weight ratio of the cellulose pulp to the carbon nanotubes is (8-10): 5. According to the invention, cellulose is used as a carbon aerogel matrix, so that agricultural wastes can be recycled, the problems of environmental pollution, resource waste and the like are reduced, the electrochemical performance of the cellulose carbonaerogel is greatly improved by doping the carbon nanotubes, and the cellulose carbon aerogel can be widely applied to the field of supercapacitors.

Description

technical field [0001] The invention relates to the technical field of carbon materials, in particular to a composite activated carbon airgel and its preparation method and application. Background technique [0002] Carbon aerogel has the characteristics of large specific surface area, good chemical stability, rich pore structure, and low density, and it has a developed three-dimensional network structure, which allows electrolyte to enter the interior of the material to store electrical energy. These characteristics make carbon aerogels have great potential in the fields of energy storage, environmental purification, and drug carriers. Traditional carbon aerogels are complex in structure, expensive, and poor in mechanical strength. In contrast, biochar aerogels are cost-effective, environmentally friendly, and have excellent mechanical properties. Therefore, biochar aerogel materials have received extensive attention in the field of supercapacitor electrode materials. Am...

Claims

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Application Information

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IPC IPC(8): B01J13/00H01G11/34H01G11/44
CPCB01J13/0091H01G11/34H01G11/44Y02E60/13
Inventor 张力平王天浩张文涛张磊曾志农
Owner BEIJING FORESTRY UNIVERSITY
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