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Preparation method of nest-shaped nitrogen-doped negative electrode porous carbon material

A technology of porous carbon materials and nitrogen doping, applied in chemical instruments and methods, carbon compounds, hybrid capacitor electrodes, etc., can solve the problems of time-consuming, high cost, unsuitable for large-scale production, etc. The effect of short time and high specific capacity

Inactive Publication Date: 2020-03-31
HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These synthesis methods are usually time-consuming and costly, so they are not suitable for large-scale production and other issues. A method for the preparation of bird's nest-like nitrogen-doped negative electrode porous carbon materials is proposed.

Method used

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  • Preparation method of nest-shaped nitrogen-doped negative electrode porous carbon material
  • Preparation method of nest-shaped nitrogen-doped negative electrode porous carbon material
  • Preparation method of nest-shaped nitrogen-doped negative electrode porous carbon material

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Effect test

Embodiment 1

[0035] Embodiment 1: A kind of preparation method of bird's nest nitrogen-doped negative electrode porous carbon material, comprises the following preparation steps:

[0036] 1) Mix 0.825g of hydroquinone and 1.25ml of 37wt% formaldehyde solution, add 10wt% hydrochloric acid solution, and stir well to obtain a mixed solution with a pH of 2;

[0037] 2) Transfer the mixed solution to a polytetrafluoroethylene-lined autoclave, and react at 180°C for 14 hours to prepare a reaction solution;

[0038] 3) The reaction solution was taken out, cooled naturally at room temperature, and then centrifuged at 8000rpm for 6min to obtain a precipitate;

[0039] 4) The precipitate was washed with water until the pH was 7, and then placed in an oven and dried under vacuum at 70°C for 18 hours to obtain a linear polymer nanobelt precursor (CsPNB);

[0040] 5) The linear polymer nanoribbon precursor (CsPNB) was mixed and ground with dicyandiamide and zinc chloride at a mass ratio of 1:1:2.5, an...

Embodiment 2

[0041] Embodiment 2: A preparation method of a bird's nest nitrogen-doped negative electrode porous carbon material, comprising the following preparation steps:

[0042] 1) Mix 0.94g of phenol and 0.81ml of 37wt% formaldehyde solution, add 10wt% sulfuric acid solution, stir well to obtain a mixed solution with a pH of 1;

[0043] 2) Transfer the mixed solution to a polytetrafluoroethylene-lined autoclave, and react at 160°C for 16 hours to prepare a reaction solution;

[0044] 3) Take out the reaction solution, cool it naturally at room temperature, and then centrifuge at 12000rpm for 3min to obtain a precipitate;

[0045] 4) The precipitate was washed with water until the pH was 7.5, and then placed in an oven at 60°C for 24 hours under vacuum to obtain a linear polymer nanobelt precursor (CsPNB);

[0046] 5) Mix and grind the linear polymer nanoribbon precursor (CsPNB) with dicyandiamide and zinc chloride at a mass ratio of 1:1:2, then place it in an argon atmosphere at 50m...

Embodiment 3

[0047] Embodiment 3: a kind of preparation method of bird's nest nitrogen-doped negative electrode porous carbon material, comprises the following preparation steps:

[0048] 1) Mix 0.33g of catechol and 2.43ml of 37wt% formaldehyde solution, add 15wt% nitric acid solution, and stir well to obtain a mixed solution with a pH of 4;

[0049] 2) Transfer the mixed solution to a polytetrafluoroethylene-lined autoclave, and react at 220°C for 12 hours to prepare a reaction solution;

[0050] 3) Take out the reaction solution, cool it naturally at room temperature, and then centrifuge at 5000rpm for 10min to obtain a precipitate;

[0051] 4) The precipitate was washed with water until the pH was 6.5, and then placed in an oven at 80°C for 12 hours in vacuum to obtain a linear polymer nanobelt precursor (CsPNB);

[0052] 5) Mix and grind the linear polymer nanoribbon precursor (CsPNB) with dicyandiamide and zinc chloride at a mass ratio of 1:1:3, then place it in an argon atmosphere ...

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Abstract

The invention discloses a preparation method of a nest-shaped nitrogen-doped negative electrode porous carbon material, belonging to the field of carbon-based supercapacitors. The preparation method comprises the following preparation steps: 1) mixing a phenolic compound, a formaldehyde solution and an inorganic acid solution; 2) heating the mixed solution for a reaction to prepare a reaction solution; 3) centrifuging the reaction solution to obtain a precipitate; 4) drying the precipitate to obtain a precursor; and 5) carbonizing the precursor, a nitrogen source and an activating agent in aninert gas atmosphere, and carrying out washing and drying to obtain the nest-shaped nitrogen-doped negative electrode porous carbon material. According to the invention, hydrothermal polymerization and a carbonization reaction are combined, so simple preparation of the nest-shaped nitrogen-doped negative electrode porous carbon material is realized; the preparation method is simple, Al2O3 or SiO2and the like do not need to be used as a template, and the preparation method is suitable for industrial large-scale production; and the prepared material is high in specific surface area, has a hierarchical porous structure, and presents high specific capacity and good rate capability under a nitrogen doping condition.

Description

technical field [0001] The invention relates to the field of carbon-based supercapacitors, in particular to a preparation method of a bird's nest-shaped nitrogen-doped negative electrode porous carbon material. Background technique [0002] With the accelerated pace of human life, people are trying to find new green energy to solve the problems of fossil energy shortage and environmental pollution. At the same time, the development of state-of-the-art energy storage devices is becoming increasingly important. In recent decades, carbon-based supercapacitors, commonly known as electric double-layer capacitors (EDLCs), have attracted much attention due to their fast charge-discharge speed, high power density, and good cycle stability. However, traditional carbon-based electrode materials have high surface hydrophobicity, limited number of specific active sites, and low specific capacitance, hindering their practical applications. In recent years, nitrogen-doped carbon materia...

Claims

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Application Information

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IPC IPC(8): C01B32/312C01B32/348H01G11/24H01G11/30H01G11/34
CPCC01B32/312C01B32/348H01G11/24H01G11/30H01G11/34Y02E60/13
Inventor 曹征领尤正军岳灵平宣少卿季世超宋庆彬许大令尹昊云曹元成
Owner HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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