Preparation method for nitrogen-doped ordered mesoporous carbon/carbon fiber composite material

A composite material and mesoporous carbon technology, which is applied in the direction of hybrid capacitor electrodes, can solve the problems of unfavorable electrolyte transmission, easy collapse of mesoporous carbon channels, and low specific surface area, so as to improve electrochemical performance and use less reagents and dosage , the effect of simple preparation method

Inactive Publication Date: 2014-08-20
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is simple, but the binary mesoporous carbon channels are easy to collapse, the pore size is narrow, and the specific surface area is low
This is not conducive to electrolyte transport, limiting its application in electrochemical energy storage and conversion

Method used

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  • Preparation method for nitrogen-doped ordered mesoporous carbon/carbon fiber composite material
  • Preparation method for nitrogen-doped ordered mesoporous carbon/carbon fiber composite material
  • Preparation method for nitrogen-doped ordered mesoporous carbon/carbon fiber composite material

Examples

Experimental program
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Embodiment 1

[0025] The preparation process and steps of the nitrogen-doped ordered mesoporous carbon / carbon fiber composite material in this example are as follows:

[0026] a. Preparation of phenolic resin prepolymer

[0027] Put 0.61g of phenol into a round bottom flask, stir and dissolve in a water bath at 40-42°C, then add 0.13g of 20wt% NaOH aqueous solution, stir for 10min, add 1.05g of 37wt% formaldehyde solution, and then heat up to 70- Stir and react at 75°C for 1 hour, lower to room temperature, then add 0.6M HCl solution dropwise, adjust the pH value of the solution to 7.0, remove water under vacuum and reduce pressure below 50°C, and dissolve the obtained viscous liquid in absolute ethanol to prepare The solution of 20wt% is standby;

[0028] b. Preparation of ordered mesoporous carbon / carbon fiber composites with self-supporting coaxial structure

[0029] Dissolve 1.6g of triblock copolymer F127 in a mixed solution of 8g of ethanol and 1g of 0.2M hydrochloric acid, stir at ...

Embodiment 2

[0031] The difference between this embodiment and Example 1 is that the self-supporting material in step b is polyacrylonitrile-based carbon fiber. Other steps and parameters are the same as Example 1.

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Abstract

The invention relates to a preparation method for nitrogen-doped ordered mesoporous carbon / carbon fiber composite material, and belongs to the technical field of mesoporous carbon-based carbon fiber composite material preparation. The preparation method mainly comprises the step that triblock copolymers serve as a structure-directing agent, phenolic resin prepolymers serve as a carbon source, ethyl orthosilicate serves as a silicon source, ethyl alcohol serves as a solvent, silk fibers serve as a nitrogen source and a substrate, the silicon dioxide component is removed through soaking, solvent evaporation induced self-assembly, crosslinking, high-temperature calcinations and etching, and finally the nitrogen-doped ordered mesoporous carbon / carbon fiber composite material with a high specific surface (230m<2> / g) is obtained. The preparation method has the advantages that the preparation process is simple, cost is low, and mass production is facilitated. The obtained carbon material can be used for double electric layer capacitors; at the scanning speed of 5mV / s, specific capacitance is 190F / g, and 90-percent capacitance is left over after 1,000 times of circulation.

Description

technical field [0001] The invention relates to a preparation method of nitrogen-doped ordered mesoporous carbon / carbon fiber composite material, belonging to the technical field of preparation technology of mesoporous carbon-based carbon fiber composite material. The main process of the method of the present invention is: take triblock copolymer as structure directing agent, phenolic resin prepolymer as carbon source, orthoethyl silicate as silicon source, ethanol as solvent, take silk fiber as nitrogen source and substrate, Through immersion, solvent volatilization induced self-assembly, cross-linking, high-temperature calcination, and etching to remove the silica component, an ordered mesoporous carbon / carbon fiber composite material with nitrogen doping was finally obtained. Background technique [0002] Electric double layer capacitors, also known as supercapacitors, because of their high power density (10 kW kg -1 ), long cycle life (more than 100,000 cycles), and fas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36
CPCY02E60/13
Inventor 刘瑞丽潘丽霞刘晓雪吴东清
Owner SHANGHAI UNIV
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