Preparation method and application of carbon-based supercapacitor electrode material

A technology of supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of unfavorable capacitor application, limited electrolyte diffusion, complex processing technology, etc., and achieves low cost and low price. , the effect of high energy storage capacity

Inactive Publication Date: 2019-04-19
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that most carbon material electrodes are prepared by mixing porous carbon with a binder, rolling or coating, the processing technology is complicated, and the use of binder has a great influence on the performance of the electrode.
At the same time, in order to ensure the efficient diffusion of the electrolyte, the electrode material is usually only a few microns to tens of microns, and the loading capacity of the electrode material is about 1mg / cm 2 , its storage capacity is low, which is not conducive to the practical application of capacitors
However, the electrolyte diffusion is limited under high load, and the specific capacitance is reduced.

Method used

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  • Preparation method and application of carbon-based supercapacitor electrode material
  • Preparation method and application of carbon-based supercapacitor electrode material
  • Preparation method and application of carbon-based supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 0.237g lignin, 0.237g polyethylene oxide-polypropylene oxide-polyoxyethylene trialkylene oxide block copolymer and 0.118g silica nanospheres (5nm) were mixed and placed in 1.78g THF solution, stirred at room temperature for 1 h. The mixed solution was placed in a mold to volatilize and remove THF. After the solvent was completely removed to obtain a thin film of the mixture, the thin film of the mixture was heated in a high-temperature furnace at 800° C. for 1 h in nitrogen. After cooling, take it out and put it in 1mol L -1 In sodium hydroxide solvent, react at 80°C for 4h to remove silicon dioxide.

Embodiment 2

[0033] 6g of lignin, 1g of polyethylene oxide-polypropylene oxide-polyethylene oxide trialkylene oxide block copolymer and 1g of silica nanorods (200nm) were mixed in 2g of tetrahydrofuran solution, Stir at room temperature for 12 h, place the mixed solution in a mold to volatilize THF to remove THF, and obtain a thin film of the mixture after the solvent is completely removed, and heat the thin film of the mixture in a high-temperature furnace at 1000° C. for 8 h in argon. After cooling, take it out and put it in 5mol L -1 In sodium hydroxide solvent, react at 100°C for 12 hours to etch and remove silicon dioxide.

Embodiment 3

[0035] 1g of cellulose, 1g of polyethylene oxide-polypropylene oxide-polyoxyethylene trioxyalkylene block copolymer and 3g of silica nanospheres (100nm) were mixed in 5g of tetrahydrofuran solution, Stir at room temperature for 6h. After the solvent was completely removed to obtain a mixture film, the mixture film was placed in a high-temperature furnace at 850° C. and heated in argon for 5 h. After cooling, take it out and place it in 3mol L -1 In sodium hydroxide solvent, react at 90°C for 8 hours to etch and remove silicon dioxide.

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Abstract

The invention particularly relates to a preparation method and application of a carbon-based supercapacitor electrode material. The method comprises the steps of: S1, adding natural carbon materials,poly-epoxy alkyl blocked copolymers and silica into an organic solvent and mixing uniformly; S2, pouring the mixed solution in step S1 into a mold to remove the organic solvent therein; and S3, placing the material obtained in step S2 in a high-temperature furnace, heating and carbonizing in an inert gas atmosphere, cooling and taking out the product, and putting the product in the alkali solutionto obtain an electrode material which can be applied to the supercapacitor electrode. The method is simple in process conditions, low in cost, high in controllability and excellent in stability, andis suitable for large-scale industrial production and practical application of supercapacitor electrodes.

Description

technical field [0001] The invention relates to a preparation method and application of a material, in particular to a preparation method and application of a carbon-based supercapacitor electrode material, and belongs to the field of supercapacitors. Background technique [0002] With the aggravation of energy crisis and environmental pollution, the problem of energy storage and conversion has attracted widespread attention from industry and scientific research circles. Due to the advantages of high power density, long service life, and short charging time, supercapacitors have become a research hotspot in the field of energy storage today. According to different energy storage mechanisms, supercapacitors are mainly divided into double-layer capacitors based on interfacial electric double layers and pseudocapacitors based on Faraday quasi-capacitance. Traditional supercapacitors are mostly double-layer capacitors based on porous carbon materials. These materials are rich i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/34H01G11/44H01G11/86
CPCH01G11/26H01G11/34H01G11/44H01G11/86Y02E60/13
Inventor 李慧李鹏程
Owner WUHAN INSTITUTE OF TECHNOLOGY
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