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Porous carbon material based on nitrogen-rich covalent organic framework structure and preparation method and application of porous carbon material

A technology of covalent organic framework and porous carbon materials, applied in the preparation/purification of carbon, manufacturing of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of limiting practical application value and low specific capacitance of carbon materials, Achieve good application prospects, increase specific capacitance, and excellent cycle stability

Inactive Publication Date: 2021-08-24
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low specific capacitance of carbon materials, the practical application value is greatly limited.

Method used

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  • Porous carbon material based on nitrogen-rich covalent organic framework structure and preparation method and application of porous carbon material
  • Porous carbon material based on nitrogen-rich covalent organic framework structure and preparation method and application of porous carbon material
  • Porous carbon material based on nitrogen-rich covalent organic framework structure and preparation method and application of porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 A porous carbon material LNU-50-1000 based on a nitrogen-rich covalent organic framework structure

[0039] The preparation method is as follows:

[0040] 1. Synthesis of nitrogen-rich covalent organic framework material LNU-50

[0041] Under a nitrogen atmosphere, 300mg (0.619mmol) of 4,4'-bis(N-carbazole)-1,1'-biphenyl, 152mg (0.825mmol) of cyanuric chloride and 1.072g (8.047mmol) of catalyst without Aluminum trichloride water was added to the round-bottomed flask, and then the oil pump was used to evacuate and nitrogen was circulated repeatedly three times, and then 30 mL of anhydrous and oxygen-free dichloromethane was added to the reaction system by injection. Finally, the reaction system was heated to 70°C and refluxed for 24 hours.

[0042] After the reaction was completed, the reactant was suction filtered to leave solid insoluble matter, which was washed with tetrahydrofuran, deionized water and acetone several times to remove possible unreacted mon...

Embodiment 2

[0047] Example 2 A porous carbon material LNU-51-1000 based on a nitrogen-rich covalent organic framework structure

[0048] The preparation method is as follows:

[0049] 1. Synthesis of nitrogen-rich covalent organic framework material LNU-51

[0050] Under nitrogen atmosphere, 300 mg (0.405 mmol) 4,4', 4"-tris(carbazol-9-yl) triphenylamine, 149 mg (0.810 mmol) cyanuric chloride and 701.860 mg (5.263 mmol) catalyst were anhydrous Aluminum trichloride is added in the round-bottomed flask, then evacuated with an oil pump and then circulated with nitrogen for three times, and then 30mL of anhydrous and oxygen-free methylene chloride is added to the reaction system by injection. Finally, the reaction system is heated To 70°C, reflux for 24 hours.

[0051] After the reaction was completed, the reactant was suction filtered to leave solid insoluble matter, which was washed with tetrahydrofuran, deionized water and acetone several times to remove possible unreacted monomer or res...

Embodiment 3

[0056] Example 3 A porous carbon material LNU-52-1000 based on a nitrogen-rich covalent organic framework structure

[0057] The preparation method is as follows:

[0058] 1. Synthesis of nitrogen-rich covalent organic framework material LNU-52

[0059] Under nitrogen, 300mg (0.523mmol) of 1,3,5-tris(9-carbazolyl)benzene, 193mg (1.046mmol) of cyanuric chloride and 906.580mg (6.799mmol) of catalyst anhydrous trichloride Aluminum was added to the round-bottomed flask, then the oil pump was used to evacuate and nitrogen was circulated repeatedly three times, and then 30 mL of anhydrous and oxygen-free dichloromethane was added to the reaction system by injection. Finally, the reaction system was heated to 70°C and refluxed for 24 hours.

[0060] After the reaction was completed, the reactant was suction filtered to leave solid insoluble matter, which was washed with tetrahydrofuran, deionized water and acetone several times to remove possible unreacted monomer or residual catal...

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Abstract

The invention discloses a porous carbon material based on a nitrogen-rich covalent organic framework structure and a preparation method and application of the porous carbon material. A nitrogen-rich covalent organic framework material LNUs is prepared through a Friedel-Crafts coupling reaction of a carbazole-containing organic monomer and cyanuric chloride, and the nitrogen-rich covalent organic framework material LNUs is directly carbonized at a high temperature as a precursor to obtain the porous carbon material. According to the method, the raw materials are easy to obtain, the preparation process is simple and reliable, the obtained precursor LNUs framework is rich in nitrogen, the porous carbon material obtained by carbonizing the precursor LNUs framework can be directly used as an electrode material of a supercapacitor, the specific capacitance value of the porous carbon material reaches up to 402F / g, excellent electrochemical performance is shown, and the porous carbon material has a very good application prospect in the field of energy storage.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to the preparation of a porous carbon material based on a nitrogen-rich covalent organic framework structure and its application in supercapacitor electrodes. Background technique [0002] With the emergence of issues such as the depletion of fossil fuels, the development of efficient energy storage devices has become a hotspot of scientific research. Supercapacitors, also known as electrochemical capacitors, are new energy storage devices that have attracted attention due to their unique advantages such as high power density, excellent cycle stability, fast charge-discharge rate, and low maintenance cost. . According to different energy storage mechanisms, supercapacitors can be divided into two categories: electric double layer capacitors and pseudocapacitors. In general, the former are made of carbon materials (graphene, carbon nanotubes, and porous carbon) that can provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/34H01G11/86H01G11/24H01G11/26H01G11/30C01B32/05
CPCH01G11/34H01G11/86H01G11/24H01G11/26H01G11/30C01B32/05Y02E60/13
Inventor 布乃顺许彦梅夏立新闫卓君谢佳林乔毅敏刘锦妮樊佳婷
Owner LIAONING UNIVERSITY
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