Nitrogen-doped carbon nanocomposite as well as preparation method and use thereof

A technology of nanocomposite materials and carbon nanomaterials, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as electrolyte channel blockage, and achieve improved specific capacitance, good fluidity, and high pseudocapacitance Effect

Inactive Publication Date: 2017-10-10
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the capacitor electrode materials are powder materials, which need to be bonded together. If the thickness of the electrode prepared by this method is too large, it will cause the blockage of the electrolyte channel.

Method used

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  • Nitrogen-doped carbon nanocomposite as well as preparation method and use thereof
  • Nitrogen-doped carbon nanocomposite as well as preparation method and use thereof
  • Nitrogen-doped carbon nanocomposite as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Add 1 g of terephthalonitrile (p-DCB) and 0.2 g of multi-walled carbon nanotubes into 100 mL of ethanol, evaporate the ethanol solvent under stirring at 78 ° C to obtain a composite of the two, and then mix the composite with anhydrous Zinc chloride 5.32g was mixed uniformly, and transferred to a tube furnace, reacted at 600°C for 10 hours, and after cooling to room temperature naturally, the obtained carbon nanocomposite was washed with 5wt% hydrochloric acid, pure water, tetrahydrofuran successively, and then Put it into an oven, and dry it at 120° C. for 10 hours to obtain a nitrogen-doped carbon nanocomposite material.

[0062] Performance Characterization:

[0063] The specific surface and pore size distribution of the nitrogen-doped carbon nanocomposite material are measured by the isothermal adsorption-desorption method of nitrogen at 77K, the specific surface area is calculated by the BET method, and the pore size distribution is calculated by the DFT method. T...

Embodiment 2

[0070] Add 1 g of isophthalonitrile (m-DCB) and 0.2 g of multi-walled carbon nanotubes into 100 mL of ethanol, evaporate the ethanol solvent under stirring at 78 ° C to obtain a composite of the two, and then mix the composite with anhydrous Zinc chloride 5.32g was mixed uniformly, and transferred to a tube furnace, reacted at 600°C for 10 hours, and after cooling to room temperature naturally, the obtained carbon nanocomposite was washed with 5wt% hydrochloric acid, pure water, tetrahydrofuran successively, and then Put it into an oven, and dry it at 120° C. for 10 hours to obtain a nitrogen-doped carbon nanocomposite material.

[0071] The nitrogen content of the composite material is 10%, and at a current density of 0.5A / g, the specific capacitance is 332F / g; at a current density of 10A / g, the specific capacitance is 267F / g; at a current density of 10A / g After 10,000 cycles, the specific capacity has not decayed.

Embodiment 3

[0073] Add 1 g of phthalonitrile (o-DCB) and 0.2 g of multi-walled carbon nanotubes into 100 mL of ethanol, evaporate the ethanol solvent under stirring at 78 ° C to obtain a composite of the two, and then mix the composite with anhydrous Zinc chloride 5.32g was mixed uniformly, and transferred to a tube furnace, reacted at 600°C for 10 hours, and after cooling to room temperature naturally, the obtained carbon nanocomposite was washed with 5wt% hydrochloric acid, pure water, tetrahydrofuran successively, and then Put it into an oven, and dry it at 120° C. for 10 hours to obtain a nitrogen-doped carbon nanocomposite material.

[0074] The nitrogen content of the composite material is 10%, and at a current density of 0.5A / g, the specific capacitance is 335F / g; at a current density of 10A / g, the specific capacitance is 263F / g; at a current density of 10A / g After 10,000 cycles, the specific capacity has not decayed.

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Abstract

The invention relates to a nitrogen-doped carbon nanocomposite, which is provided with a conductive network structure and is formed by making a nitrogen element participate in a conductive network skeleton, wherein the conductive network structure is obtained after in situ polymerization of an aromatic nitrile compound monomer and a carbon nanomaterial or after polymerization of a prepolymer of the aromatic nitrile compound monomer and the carbon nanomaterial. A composite structure of an aromatic nitrile polymer/carbon nanomaterial is obtained through polymerization of the aromatic nitrile compound monomer and the carbon nanomaterial, the carbon nanomaterial is taken as a basic skeleton to provide abundant conductive networks and good mechanical toughness, and the aromatic nitrile polymer has the characteristics of high nitrogen content doping and uniform nitrogen element distribution and is of a pore structure with high specific surface area and uniform distribution; and the nitrogen-doped carbon nanocomposite provided by the invention shows high specific capacitance and cycling stability in a supercapacitor.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and specifically relates to a nitrogen-doped carbon nanocomposite material and its preparation method and application, in particular to an electrode material based on aromatic nitrile polymer / carbon nanometer, a preparation method and a supercapacitor using the same. Background technique [0002] Carbon-based supercapacitors store charges by forming an electric double layer on the surface of electrode materials through electrolyte ions, so they are not limited by the electrochemical reaction rate like batteries, so they have the characteristics of fast charge and discharge, and can maintain millions of charges. The number of loop cycles. However, at this stage, the electrical energy stored in supercapacitors is an order of magnitude lower than that of batteries, which limits the commercial application range of supercapacitors. Therefore, the current research on supercapacitors is mainly to improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/30H01G11/86
CPCH01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 智林杰梁家旭肖志昌
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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