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Method for preparing carbon nanotube/boron nitrogen co-doped porous carbon composite material

A technology of carbon nanotubes and composite materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of poor safety, low yield, complex synthesis methods, etc., and achieve the effect of improving electrical conductivity and high specific surface area

Inactive Publication Date: 2018-09-21
QIQIHAR UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to make up for the deficiencies in the prior art, the present invention provides a method for preparing a carbon nanotube / boron-nitrogen co-doped porous carbon composite material, which solves the problem of the synthesis method in the preparation process of the carbon nanotube / boron-nitrogen co-doped porous carbon composite material. Complexity, low electrochemical activity, poor safety, low yield, and a large number of chemically inert B-N bonds, etc.

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  • Method for preparing carbon nanotube/boron nitrogen co-doped porous carbon composite material

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Embodiment 1

[0041] The preparation method of the carbon nanotube / boron-nitrogen co-doped porous carbon composite material of this embodiment comprises the following steps:

[0042] (1) Disperse 0.2 g of carbon nanotubes in 50 mL of deionized water to obtain a suspension of carbon nanotubes, and add 1 g of polyvinylpyrrolidone to the suspension. After stirring for 4 hours at a stirring speed of 1000 rpm, the solid phase was obtained by filtration, washed and then dried at 60°C to obtain pretreated carbon nanotubes;

[0043] (2) Ultrasonic disperse 0.2g of pretreated carbon nanotubes into 50mL of aqueous solution, add a certain amount of melamine and sodium hydroxide activator to the solution, and stir at a temperature of 50°C and a stirring speed of 100r / min. 2h, wherein the mass ratio of pretreated carbon nanotubes to nitrogen-containing carbon source and activator is 1:4:8.

[0044] (3) Add 0.8 g of boric acid to the solution obtained in step 2, continue to stir for 4 h at a temperature...

Embodiment 2

[0054] (1) Disperse 0.2 g of carbon nanotubes in 100 mL of deionized water to obtain a suspension of carbon nanotubes, and add 1.8 g of polyvinylpyrrolidone to the suspension. After stirring for 7 hours at a stirring speed of 500 rpm, the solid phase was obtained by filtration, washed and then dried at 80°C to obtain pretreated carbon nanotubes;

[0055] (2) Ultrasonic disperse 0.2g of pretreated carbon nanotubes into 60mL of aqueous solution, add a certain amount of melamine and sodium hydroxide activator to the solution, and stir at a temperature of 30°C and a stirring speed of 200r / min. 5h, wherein the mass ratio of pretreated carbon nanotubes to nitrogen-containing carbon source and activator is 1:5:12.

[0056] (3) Add 1.0 g of boric acid to the suspension obtained in step 2, continue to stir for 7 hours at a temperature of 80°C and a stirring speed of 200r / min, and then solidify at a temperature of 120°C to obtain a solid ligand.

[0057] (4) The solid ligand obtained i...

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Abstract

The invention discloses a method for preparing a carbon nanotube / boron nitrogen co-doped porous carbon composite material and belongs to the technical field of the preparation of a super capacitor nano electrode material. The specific method comprises the steps of (1) the pretreatment of carbon nanotubes, (2) the coordination polymerization of the pretreated carbon nanotubes with a nitrogen-containing carbon source and a metal activator, (3) the further coordination and coordination body solidification of a boron source and a coordinated precursor, (4) the heat treatment of a coordination bodyunder the protection of an inert gas, and (5) acid leaching treatment, washing and drying to obtain the carbon nanotube / boron nitrogen co-doped porous carbon composite material. The product preparedby the invention has the advantages of a large specific surface, good electrical conductivity and high electrochemical activity, the method has the advantages of a simple preparation process, high safety, low production cost, high product yield and simple equipment for reaction, and so that the industrialization is easy. The prepared electrode material shows very excellent capacitance characteristics.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor nano electrode materials, and in particular relates to a preparation method of a carbon nanotube / boron nitrogen co-doped porous carbon composite electrode material. Background technique [0002] As a new type of energy storage device, supercapacitors are widely used in portable instruments, power hybrid vehicles, information technology, etc. It has important commercial prospects and extensive application value in this field. For a long time, the commercial production of supercapacitors still faces two major problems: poor stability and low energy density. Therefore, it is very important to design and synthesize supercapacitor materials with high cycle life and high energy without sacrificing power density and maintaining cost. [0003] Boron and nitrogen co-doped porous carbon materials are a class of very potential supercapacitor electrode materials due to their excellent ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/32H01G11/34H01G11/36
CPCH01G11/24H01G11/32H01G11/34H01G11/36Y02E60/13
Inventor 孙立赵楠江艳李宏扬张转芳宋伟明邓启刚
Owner QIQIHAR UNIVERSITY
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