Vanadium dioxide nano carbon fiber composite material, preparation method and application thereof

A vanadium dioxide nanometer and composite material technology, applied in the field of vanadium dioxide nanometer carbon fiber composite material and its preparation, can solve problems such as performance limitation, and achieve the effects of low production cost, improved specific capacitance and simple production process

Active Publication Date: 2021-01-15
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because it only uses the electric double layer to store energy, its performance is limited, so carbon materials are often modified, such as preparing composite materials with metal oxide materials, composite materials combined with nanotechnology, etc. Increased Charge Utilization Efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 adopts the method of the present invention to prepare vanadium dioxide nano-carbon fiber composite material

[0030] Take polyacrylonitrile solution (commercially available, polyacrylonitrile is dissolved in dimethylformamide, the concentration is 90% w / w) and ethylene glycol vanadyl solution are mixed uniformly according to the volume ratio of 8:1, and the dimethylformamide The amide was diluted to a total content of 20% v / v of polyacrylonitrile and vanadyl glycolate. A polyacrylonitrile felt with a thickness of 0.5 mm was woven under the conditions of a spinning distance of 16 cm and a voltage of 18 kV. Put the felt in a carbonization furnace, pre-oxidize it at 180°C for 120 minutes, and pass high-purity N 2 , and then reacted at 600°C, 650°C, 700°C, 750°C, and 800°C for 20 minutes respectively, and then slowly introduced CO 2 , after 10 minutes of reaction, high-purity N 2 When the temperature drops to room temperature, take out the composite material...

Embodiment 2

[0031] Embodiment 2 adopts the method of the present invention to prepare vanadium dioxide nano-carbon fiber composite material

[0032] Take polyacrylonitrile solution (commercially available, polyacrylonitrile is dissolved in dimethylformamide, the concentration is 90% w / w) and ethylene glycol vanadyl solution are mixed uniformly according to the volume ratio of 6:1, and the dimethylformamide The amide was diluted to a total content of 15% v / v of polyacrylonitrile and vanadyl glycolate. A polyacrylonitrile felt with a thickness of 0.7 mm was woven under the conditions of a spinning distance of 15 cm and a voltage of 18 kV. Put the felt in a carbonization furnace, pre-oxidize it at 200°C for 100 minutes, and pass high-purity N 2 , and then reacted at 600°C, 650°C, 700°C, 750°C, and 800°C for 30 minutes respectively, and then slowly introduced CO 2 , after 20 minutes of reaction, high-purity N 2 When the temperature drops to room temperature, take out the composite material...

Embodiment 3

[0033] Embodiment 3 adopts the method of the present invention to prepare vanadium dioxide nano-carbon fiber composite material

[0034] Take polyacrylonitrile solution (commercially available, polyacrylonitrile is dissolved in dimethylformamide, the concentration is 90% w / w) and ethylene glycol vanadyl solution are mixed uniformly according to the volume ratio of 4:1, and the dimethylformamide The amide was diluted to a total content of 10% v / v of polyacrylonitrile and vanadyl glycolate. A polyacrylonitrile felt with a thickness of 0.8 mm was woven under the condition of a spinning distance of 14 cm and a voltage of 18 kV. Put the felt in a carbonization furnace, pre-oxidize it at 250°C for 80 minutes, and pass high-purity N 2 , and then reacted at 600°C, 650°C, 700°C, 750°C, and 800°C for 40 minutes, and then slowly introduced CO 2 , after 30 minutes of reaction, high-purity N 2 When the temperature drops to room temperature, take out the composite material. The particle...

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Abstract

The invention relates to a vanadium dioxide nano carbon fiber composite material, a preparation method and an application thereof, and belongs to the technical field of electrode materials. The invention provides the preparation method of the vanadium dioxide nano carbon fiber composite material. The method comprises the following steps: a. preparing an ethylene glycol vanadyl solution: mixing ammonium metavanadate and ethylene glycol according to a mass ratio of 1: (5-10), and reacting to generate ethylene glycol vanadyl for later use; b, preparing a spinning solution: uniformly mixing a polyacrylonitrile solution with the ethylene glycol vanadyl solution obtained in the step a according to a volume ratio of the polyacrylonitrile solution to the ethylene glycol vanadyl solution of (5:5)-(9:1) in terms of 90% w / w of the content of the polyacrylonitrile solution, and then diluting the mixed solution till that the total content of polyacrylonitrile and ethylene glycol vanadyl is 5-20% v / v; c, carrying out electrostatic spinning by using the spinning solution obtained in the step a; and d, preparing a composite material. The preparation method disclosed by the invention has good popularization and application prospects.

Description

technical field [0001] The invention relates to a vanadium dioxide nano-carbon fiber composite material, a preparation method and an application thereof, and belongs to the technical field of electrode materials. Background technique [0002] Supercapacitor is an efficient, practical, and environmentally friendly energy storage device, which has the advantages of high power density, convenient control, high conversion efficiency, wide operating temperature range, and no pollution. With the improvement of technology development level and the gradual reduction of production costs, supercapacitors are more and more used in the field of energy storage, and it is very likely that they will replace batteries for energy storage in many occasions in the future. However, the current supercapacitors are still expensive, which limits their application in large-scale power storage. Therefore, further reducing production costs is an essential step for the future development of supercapa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/46H01G11/86
CPCH01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 李道玉辛亚男姚洁彭穗
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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