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Nitrogen-oxygen co-doped hollow carbon nanospheres, preparation method and application thereof

A carbon nano-microsphere, co-doping technology, applied in nano-carbon, nano-technology, nano-technology and other directions, can solve the problem of unsatisfactory surface area utilization rate and electrochemical performance, poor wettability of hollow carbon nano-microsphere, and cycle stability. Unsatisfactory and other problems, to achieve good rate performance and cycle stability, improve the utilization rate of specific surface area, and control the thickness of the spherical shell

Active Publication Date: 2020-06-19
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a nitrogen-oxygen co-doped hollow carbon nanosphere and its preparation method to solve the cumbersome and time-consuming process of the existing hollow carbon nanosphere preparation method. , low yield, poor safety, and poor wettability of prepared hollow carbon nanospheres, unsatisfactory surface area utilization and electrochemical performance technical problems
[0006] Another object of the present invention is to provide a supercapacitor electrode and a supercapacitor to solve the technical problems that the existing supercapacitor has low specific capacitance and rate performance and unsatisfactory cycle stability due to its electrode material

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  • Nitrogen-oxygen co-doped hollow carbon nanospheres, preparation method and application thereof
  • Nitrogen-oxygen co-doped hollow carbon nanospheres, preparation method and application thereof
  • Nitrogen-oxygen co-doped hollow carbon nanospheres, preparation method and application thereof

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preparation example Construction

[0025] On the one hand, an embodiment of the present invention provides a method for preparing nitrogen and oxygen co-doped hollow carbon nanospheres. The preparation method of the nitrogen-oxygen co-doped hollow carbon nanospheres comprises the following steps:

[0026] Step S01. Prepare hollow carbon nanosphere precursor:

[0027] Polymerize pyrrole and aniline in an aqueous solution containing a soft template to obtain a hollow carbon nanosphere precursor;

[0028] Step S02. Carbonizing and activating the hollow carbon nanosphere precursor:

[0029] The hollow carbon nanometer microsphere precursor is washed, pulverized, and then subjected to carbonization treatment and ammonia water activation treatment to obtain nitrogen and oxygen co-doped hollow carbon nanometer microspheres.

[0030] Wherein, the method for polymerizing the pyrrole and aniline in the aqueous solution containing the soft template in step S01 can be carried out according to the following steps:

[003...

Embodiment 1

[0053] This embodiment provides a nitrogen-oxygen co-doped hollow carbon nanosphere and a preparation method thereof. The preparation method of the nitrogen-oxygen co-doped hollow carbon nanospheres comprises the following steps:

[0054] S11: Add 0.45 g of Triton X-100 solution at 2°C to 450 g of deionized water at 2°C, stir with a magnetic stirrer for 60 minutes and mix evenly to form a diluted Triton X-100 solution;

[0055] S12: Add 2.2 g of pyrrole at 2°C and 2.8 g of aniline at 2°C to the diluted Triton X-100 solution prepared in the above steps, and continue stirring for 30 minutes to make pyrrole and aniline dissolve in Triton X-100. 100 evenly distributed in the solution;

[0056] S13: Add 60 mL of newly prepared 1M ammonium persulfate solution to the solution in step S12, stir gently for 30 s, and then stand for reaction at an ambient temperature of 0°C for 12 h;

[0057] S14: Wash the product obtained in step S13 with water several times, and filter it with suctio...

Embodiment 2

[0061] This embodiment provides a nitrogen-oxygen co-doped hollow carbon nanosphere and a preparation method thereof. The preparation method of the nitrogen-oxygen co-doped hollow carbon nanospheres comprises the following steps:

[0062] S11: add 0.6 g of Triton X-100 solution at 2°C to 500 g of deionized water at 2°C, stir with a magnetic stirrer for 60 minutes and mix evenly to form a diluted Triton X-100 solution;

[0063] S12: Add 2.0 g of pyrrole at 2°C and 2.4 g of aniline at 2°C to the diluted Triton X-100 solution prepared in the above steps, and continue stirring for 30 minutes to make pyrrole and aniline dissolve in Triton X-100. 100 evenly distributed in the solution;

[0064] S13: Add 50 mL of newly prepared 1M ammonium persulfate solution to the solution in step S12, stir gently for 50 s, and then stand for reaction at an ambient temperature of 3° C. for 8 h;

[0065] S14: The product obtained in step S13 is washed with water several times, and suction filtered...

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Abstract

The invention discloses nitrogen-oxygen co-doped hollow carbon nanospheres, a preparation method thereof, a supercapacitor electrode and a supercapacitor. The preparation method of the nitrogen-oxygenco-doped hollow carbon nanospheres comprises the steps as follows: pyrrole and aniline are subjected to a polymerization reaction in a water liquor containing a soft template, and a hollow carbon nanosphere precursor is obtained; the hollow carbon nanosphere precursor is washed, pulverization treatment, carbonization treatment and ammonia water activation treatment are performed, and the nitrogen-oxygen co-doped hollow carbon nanospheres are obtained. The nitrogen-oxygen co-doped hollow carbon nanospheres prepared with the preparation method have larger specific surface area, good wettabilityand high specific surface area utilization rate. The supercapacitor electrode and the supercapacitor comprise the nitrogen-oxygen co-doped hollow carbon nanospheres prepared with the method.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a nitrogen-oxygen co-doped hollow carbon nano-microsphere and its preparation method and application. Background technique [0002] At present, the earth is facing enormous energy challenges. Continuous oil crises and environmental problems force countries to start looking for new clean and renewable energy sources. To solve these problems, energy storage and management devices play a key role. In recent years, supercapacitors have attracted great attention. As a new type of energy storage device, it has fast charging and discharging, high power density, no pollution and excellent cycle stability, so it has broad application prospects in communication equipment, transportation, aerospace and other fields. [0003] Carbon materials are considered to be the most ideal materials for industrial supercapacitors. Carbon-based electrochemical capacitors are typical electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15B82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/36H01G11/38
CPCB82Y30/00B82Y40/00C01B32/15H01G11/24H01G11/30H01G11/36H01G11/38Y02E60/13
Inventor 邹继兆余良曾燮榕曾绍忠黎晓华姚跃超刘世钰涂文烜陈双双
Owner SHENZHEN UNIV
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