Vanadium dioxide carbon fiber felt composite material and its preparation method and use

A technology of vanadium dioxide carbon fiber and composite materials, which is applied in the direction of carbon fiber, fiber processing, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of unfavorable super capacitor development and high price, and achieve sustainable production and production The effect of low cost and simple operation

Active Publication Date: 2022-07-29
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

Although metal oxide material electrodes have a large specific capacity, they are expensive, which is not conducive to the development of supercapacitors.
Conductive polymers, such as commonly used polyaniline, polypyrrole, and poly(3,4-vinyldioxyethylene) are also widely used as electrode materials for supercapacitors, and are usually mixed with other electrode materials to prepare supercapacitors, but It's also very expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of vanadium dioxide carbon fiber felt composite material by the method of the present invention

[0030] Ammonium metavanadate: ethylene glycol was mixed according to the mass ratio of 1:6, reacted at 50 ° C for 6 hours, stirred at a speed of 600r / min in the reaction process, then cooled to room temperature, filtered (the purpose of filtration is to remove part Incompletely reacted ammonium metavanadate), the filtrate is for use. The carbon fiber felt obtained through the pretreatment was directly immersed in the filtrate, and then the carbon fiber felt was taken out and dried in an oven at 60°C. The dried carbon fiber felt was put into a tube furnace and reacted at 300° C. for 3 hours. Using the prepared composite material as the electrode material, the specific capacitance of the electrode is 0.198F·cm -2 , at a current density of 10 mA cm -2 After 2000 cycles of charging and discharging, the specific capacitance is 91.05% of the initial value...

Embodiment 2

[0031] Example 2 Preparation of vanadium dioxide carbon fiber felt composite material by the method of the present invention

[0032] Ammonium metavanadate: ethylene glycol was mixed according to the mass ratio of 1:8, reacted at 60 ° C for 5 hours, stirred at a speed of 500r / min during the reaction, then cooled to room temperature, filtered (the purpose of filtration is to remove part Incompletely reacted ammonium metavanadate), the filtrate is for use. The carbon fiber felt obtained through the pretreatment was directly immersed in the filtrate, and then the carbon fiber felt was taken out and dried in an oven at 70°C. The dried carbon fiber felt was put into a tube furnace and reacted at 250° C. for 3 hours. The prepared composite material was used as the electrode material, and the specific capacitance of the electrode was 0.211 F cm -2 , at a current density of 15 mA cm -2 After 2000 cycles of charge and discharge, the specific capacitance is 90.02% of the initial valu...

Embodiment 3

[0033] Example 3 Preparation of vanadium dioxide carbon fiber felt composite material by the method of the present invention

[0034] Ammonium metavanadate: ethylene glycol was mixed according to the mass ratio of 1:10, reacted at 80 ° C for 4 hours, stirred at a speed of 400r / min during the reaction, then cooled to room temperature, filtered (the purpose of filtration is to remove part of the mixture) Incompletely reacted ammonium metavanadate), the filtrate is for use. The carbon fiber felt obtained through the pretreatment was directly immersed in the filtrate, and then the carbon fiber felt was taken out and dried in an oven at 80°C. The dried carbon fiber felt was put into a tube furnace and reacted at 200° C. for 3 hours. The prepared composite material was used as the electrode material, and the specific capacitance of the electrode was 0.241 F cm -2 , for a current density of 15 mA cm -2 After 2000 cycles of charge and discharge, the specific capacitance is 92.11% o...

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Abstract

The invention relates to a vanadium dioxide carbon fiber felt composite material, a preparation method and application thereof, and belongs to the technical field of electrode materials. The invention provides a method for preparing a vanadium dioxide carbon fiber felt composite material, comprising the following steps: a. Pretreatment of the carbon fiber felt: soaking the carbon fiber felt in acetone, then rinsing with water, drying, and heating at 100-200 DEG C for 3-3 5 hours, the treated carbon fiber felt is for subsequent use; b, preparation of ethylene glycol vanadyl solution: ammonium metavanadate: ethylene glycol is mixed in a ratio of 1: (5~10) by mass ratio, and the reaction generates ethylene glycol Vanadyl, for subsequent use; c, the preparation of composite material: put the carbon fiber felt obtained in step a into the ethylene glycol vanadyl solution obtained in step b and soak, then take out the carbon fiber felt, dry, then place in a tube furnace, pass through Enter N 2 , and react at 200~300℃ for 2~4 hours to obtain. The preparation method of the invention has a good prospect of popularization and application.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/47H01G11/46H01G11/86H01G11/40D06M101/40
CPCD06M11/47H01G11/46H01G11/86H01G11/40D06M2101/40
Inventor 李道玉刘波姚洁彭穗
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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