Nitrogen and phosphor co-doped porous carbon nanotube, and preparation method and application thereof

A technology of carbon nanotubes and nanotubes, which is applied in the field of inorganic nanomaterial chemistry and electrochemistry, can solve the problems of destroying the internal structure and the decrease of the conductivity of active materials, etc., and achieve the effect of extensive sources, remarkable achievements, and simple post-processing

Inactive Publication Date: 2015-10-28
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method may cause a decrease in the conductivity of the active material and destroy its internal structure.

Method used

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  • Nitrogen and phosphor co-doped porous carbon nanotube, and preparation method and application thereof
  • Nitrogen and phosphor co-doped porous carbon nanotube, and preparation method and application thereof
  • Nitrogen and phosphor co-doped porous carbon nanotube, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of nitrogen and phosphorus co-doped porous carbon nanotubes, comprising the steps of:

[0031] 1) Preparation of carboxylated carbon nanotubes: In a 100 ml dry three-neck flask, add 100 mg of pure carbon nanotubes, then slowly add 10 ml of concentrated nitric acid and 30 ml of concentrated sulfuric acid in sequence, stir the reaction at 70 °C for 2 h, and statically Set to cool, add water to wash, suction filter until neutral, and dry to obtain carboxylated carbon nanotubes;

[0032]2) Preparation of melamine-phenolic resin-wrapped carbon nanotubes: take 30 mg of carboxylated carbon nanotubes obtained in step 1) and disperse them in 20 ml of water, sonicate for 30 min; then add 30 mL of water, 20 mL of absolute ethanol and 250 μL of 25wt % concentrated ammonia water, heated and stirred at 70 °C for 30 min (heating power 200 W, stirring rate 2100 rpm). Then add 0.275 g resorcinol and 0.37 mL formaldehyde solution (37 wt %); continue heating and stir...

Embodiment 2

[0042] A preparation method of nitrogen and phosphorus co-doped porous carbon nanotubes, comprising the steps of:

[0043] 1) Preparation of carboxylated carbon nanotubes: same as Step 1 of Example 1);

[0044] 2) Preparation of melamine-phenolic resin-wrapped carbon nanotubes: same as Step 2 of Example 1);

[0045] 3) The difference is that the phosphating agent is changed to sodium hypophosphite, and other steps are the same as step 3) of Example 1.

Embodiment 3

[0047] A preparation method of nitrogen and phosphorus co-doped porous carbon nanotubes, comprising the steps of:

[0048] 1) Preparation of carboxylated carbon nanotubes: same as Step 1 of Example 1);

[0049] 2) Preparation of melamine-phenolic resin-wrapped carbon nanotubes: same as Step 2 of Example 1);

[0050] 3) The difference is that the phosphating agent is changed to phosphoric acid, and other steps are the same as step 3) of Example 1.

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Abstract

The invention relates to a preparation method of a nitrogen and phosphor co-doped porous carbon nanotube. The method includes the following steps: 1) preparing a carboxylation carbon nanotube; 2) preparing a melamine-phenolic resin wrapped carbon nanotube by taking melamine-resorcinol-presence of formaldehyde resin as a precursor; and 3) conducting phosphatization: mixing the melamine-phenolic resin wrapped carbon nanotube obtained from the step 2) with a phosphatization agent, dispersing the mixture in deionized water in an ultrasonic manner, drying the mixture, enabling a dried product to rise to 600-900 DEG C in an inert atmosphere and to be phosphatized for 120-180min, naturally cooling the product to a room temperature, washing obtained black powder with water, performing pumping filtration until the powder is neutral, drying and finally obtaining the nanotube. The prepared nitrogen and phosphor co-doped porous carbon nanotube enables the specific capacitance of a capacitor to be substantially increased.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanomaterial chemistry and electrochemistry, and specifically relates to a nitrogen-phosphorus co-doped porous carbon nanotube, a preparation method and its application in improving the specific capacitance of a capacitor. Background technique [0002] Due to the increasing shortage of oil resources and the pollution of the environment by the exhaust emissions of internal combustion engines burning oil, people are studying new energy devices to replace internal combustion engines. As a clean and efficient new energy storage device, supercapacitors have attracted more and more attention from researchers because of their high energy density, power density, fast charging speed, long cycle life, and high safety factor. The core of the development of supercapacitor technology is to prepare high-performance electrode materials. Due to its low density, high specific surface area, good chemical stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36C01B31/02B82Y30/00
Inventor 张佳楠李圆圆许群张祥兰姜向阳
Owner ZHENGZHOU UNIV
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