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Preparation method for nitrogen-doped mesoporous carbon nanofiber

A nitrogen-doped mesoporous carbon and nanofiber technology is applied in the chemical characteristics of fibers, rayon manufacturing, hybrid/electric double-layer capacitor manufacturing, etc. Simple design method, high specific capacitance, high nitrogen content effect

Inactive Publication Date: 2016-11-09
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the poor dispersion and ion affinity of carbon materials that limit their applications, researchers usually improve their performance by doping heteroatoms such as nitrogen and boron.

Method used

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  • Preparation method for nitrogen-doped mesoporous carbon nanofiber
  • Preparation method for nitrogen-doped mesoporous carbon nanofiber
  • Preparation method for nitrogen-doped mesoporous carbon nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of gelatin–urea-1:20 mixed fiber:

[0021] Dissolve 0.5 g of gelatin in 25 mL of deionized aqueous solution, and stir until uniform at 60° C. to obtain a gelatin solution with a mass concentration of 20 g / L.

[0022] Add 10 g of urea to the above solution, react at 60°C for 30 min, cool to room temperature after the reaction, and then obtain a large amount of sol as a precursor. Then spread the cooled precursor on a glass plate and put it into a 40°C oven to dry. Finally, the film was scraped off and collected for future use.

[0023] (2) Preparation of nitrogen-doped porous carbon nanofibers:

[0024] The above-prepared film was placed in a vacuum tube furnace, and nitrogen gas was introduced for 20 minutes in advance, and then the temperature was raised to 600°C at a heating rate of 5°C / min and kept for 2h. The obtained black fiber film was nitrogen-doped porous carbon nanofibers.

Embodiment 2

[0026] (1) Preparation of gelatin–urea-1:20 mixed fiber:

[0027] Dissolve 0.5g of gelatin in 25mL of deionized aqueous solution, and stir until uniform at 60°C to obtain a gelatin solution with a mass concentration of 20g / L.

[0028] Add 10 g of urea to the above solution, react at 60° C. for 30 minutes, cool to room temperature after the reaction, and obtain a large amount of sol as a precursor. Then the cooled precursor was spread on a glass plate, and added to a 40°C oven to dry. Finally, the film was scraped off and collected for future use.

[0029] (2) Preparation of nitrogen-doped porous carbon nanofibers:

[0030] The above-prepared membrane was placed in a vacuum tube furnace, and nitrogen gas was introduced for 20 minutes in advance, and then the temperature was raised to 800°C at a heating rate of 5°C / min and kept for 2h to obtain a black fiber membrane, namely nitrogen-doped porous carbon nanofibers.

Embodiment 3

[0032] (1) Preparation of gelatin–urea-1:20 mixed fiber:

[0033] Dissolve 0.5g of gelatin in 25mL of deionized aqueous solution, and stir until uniform at 60°C to obtain a gelatin solution with a mass concentration of 20g / L.

[0034] Add 10 g of urea to the above solution, react at 60° C. for 30 minutes, cool to room temperature after the reaction, and obtain a large amount of sol as a precursor. Then the cooled precursor was spread on a glass plate, and added to a 40°C oven to dry. Finally, the film was scraped off and collected for later use;

[0035] (2) Preparation of nitrogen-doped porous carbon nanofibers:

[0036] The above-prepared film was placed in a vacuum tube furnace, and nitrogen gas was introduced for 20 minutes in advance, and then the temperature was raised to 1000°C at a heating rate of 5°C / min and kept for 2h. The obtained black fiber film was nitrogen-doped porous carbon nanofibers.

[0037] 2. Product characteristics:

[0038] figure 1 It is the POM ...

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Abstract

A preparation method for nitrogen-doped mesoporous carbon nanofiber relates to the technical field of electrode materials of supercapacitors. According to the preparation method, gelatin is taken as a carbon source, urea is taken as a nitrogen source and a template, under evaporation driving of a solvent water, urea is crystalized, gelatin molecules are self-assembled on the surface of urea crystal, gelatin is subjected to condensation and carbonization at a high temperature, urea molecules are decomposed and nitrogen atoms are doped into the carbon material, and finally nitrogen-doped mesoporous carbon nanofiber is prepared. The advantages comprise that the prepared electrode material possesses relatively high nitrogen content, large specific surface area and high graphitization degree, also possesses relatively good electrochemical performances, and also possesses important application value in fields of capacitor electrode materials and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of supercapacitor electrode materials. Background technique [0002] As the most commonly used electrode material for supercapacitors, carbon nanomaterials have good electrical conductivity, large specific surface area, and excellent electrochemical stability. Carbon materials are low in cost and rich in resources, making them important materials in the field of energy storage. However, due to the poor dispersion and ion affinity of carbon materials, their applications are limited. Researchers usually improve their performance by doping heteroatoms such as nitrogen and boron. Nitrogen doping can enhance the surface wettability and electronic conductivity of carbon materials, making them have good cycling ability. At the same time, nitrogen atoms will also increase the pseudocapacitive effect, thereby improving the electrochemical performance of the material. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/18D01F1/10H01G11/36H01G11/86
CPCY02E60/13D01F9/18D01F1/10H01G11/36H01G11/86
Inventor 范磊杨莉徐祥东郭荣
Owner YANGZHOU UNIV
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