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Preparation method of nitrogen/oxygen co-doped porous carbon nanoribbons

A technology of co-doping and porous carbon, applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problem of low specific capacitance, and achieve the effect of increasing specific surface area and similar capacitance

Active Publication Date: 2022-02-11
黑龙江省石墨制造业创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for preparing nitrogen / oxygen co-doped porous carbon nanobelts in order to solve the problem of low specific capacitance as an electrode material caused by the lack of pore structure in existing carbon materials

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  • Preparation method of nitrogen/oxygen co-doped porous carbon nanoribbons
  • Preparation method of nitrogen/oxygen co-doped porous carbon nanoribbons
  • Preparation method of nitrogen/oxygen co-doped porous carbon nanoribbons

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specific Embodiment approach 1

[0022] Specific embodiment one: the preparation method of nitrogen / oxygen co-doped porous carbon nanoribbons in this embodiment is carried out according to the following steps:

[0023] Step 1: Preparation of polypyrrole precursor:

[0024] Under a water bath, add hexadecyltrimethylammonium bromide into the aqueous HCl solution and stir, then add ammonium persulfate, and continue stirring for 0.5-4 hours to obtain an emulsion;

[0025] Slowly add pyrrole to the emulsion, stir and react in a water bath for 6-48 hours, after the reaction, wash the product with absolute ethanol and distilled water until the filtrate is colorless and neutral, and finally vacuum-dry to obtain The polypyrrole precursor;

[0026] The volume ratio of the mass of the cetyltrimethylammonium bromide to the aqueous HCl solution is (5-10) g: (40-100) mL;

[0027] The volume ratio of the quality of the ammonium persulfate to the aqueous HCl solution is (5-10) g: (40-100) mL;

[0028] The volume ratio of ...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment is different from Embodiment 1 in that: the temperature of the water bath in Step 1 is 0-15°C. Other steps and parameters are the same as those in the first embodiment. The temperature of the water bath is 0-15°C, which can prevent oxidation of the pyrrole monomer.

specific Embodiment approach 3

[0037] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the concentration of the HCl aqueous solution in Step 1 is 1-3 mol / L. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of nitrogen / oxygen co-doped porous carbon nanobelt, relating to a preparation method of porous carbon nanobelt. The purpose is to solve the problem of low specific capacitance when the carbon material lacks a pore structure as an electrode material of a supercapacitor. Methods: Using polypyrrole as carbon and nitrogen sources, the polypyrrole precursor was prepared by in-situ template polymerization, and then the polypyrrole precursor was activated and calcined to obtain a three-dimensional heteroatom-doped carbon material with a hierarchical pore structure, namely Nitrogen / oxygen co-doped porous carbon nanobelts. The porous carbon nanobelt prepared by the invention has a porous structure, which is beneficial to the infiltration of the electrolyte and the ion transmission of the electrolyte, so it has better specific capacitance as an electrode material of a supercapacitor. And most of the nanoribbons in the nitrogen / oxygen co-doped porous carbon nanobelts are curled, which is beneficial to the increase of the specific surface area. The invention is suitable for preparing porous carbon nanobelts.

Description

technical field [0001] The invention relates to a method for preparing a porous carbon nanobelt. Background technique [0002] Supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. Compared with traditional capacitors, supercapacitors have larger capacity density and energy density, wider operating temperature range and extremely long service life. Compared with batteries, supercapacitors have higher specific power and are non-polluting to the environment. In particular, the capacity of supercapacitors can reach hundreds to thousands of farads. As the core component of supercapacitors, electrode materials determine the energy storage characteristics, production costs and application fields of supercapacitors. According to the energy storage mechanism, electrode materials for supercapacitors are mainly divided into: electric double layer capacitance materials based on high specific surface area materials and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/36H01G11/86
CPCH01G11/26H01G11/36H01G11/86Y02E60/13
Inventor 马宇良阚侃王珏张晓臣张伟君
Owner 黑龙江省石墨制造业创新中心有限公司