Nitrogen-doped porous carbon nanotube material and its preparation method and use in super capacitor electrode

A technology of nitrogen-doped porous carbon and carbon nanotubes, applied in hybrid capacitor electrodes, nanotechnology, nanotechnology, etc., can solve problems such as hindering the contact between electrolyte and electrode active material, low specific surface area, and unsatisfactory performance

Inactive Publication Date: 2016-02-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common carbon materials include activated carbon, mesoporous carbon, carbon nanotubes and graphene. For activated carbon, it is widely used in commercial applications due to its high specific surface area and low cost; however, its high microporosity hinders the electrolyte and electrode The contact of the active material, so the performance at high magnification is not satisfactory
Carbon nanotubes are considered to be the most promising electrode materials due to their well-developed pore structure and high electronic conductivity, but their low specific surface area limits their application in capacitors.

Method used

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  • Nitrogen-doped porous carbon nanotube material and its preparation method and use in super capacitor electrode
  • Nitrogen-doped porous carbon nanotube material and its preparation method and use in super capacitor electrode
  • Nitrogen-doped porous carbon nanotube material and its preparation method and use in super capacitor electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Weigh 2mL of aniline and 6.84g of ammonium persulfate and dissolve them in 100ml of deionized water respectively to prepare the aniline solution and ammonium persulfate solution. After stirring evenly, let stand at 5°C for 30 minutes, then quickly pour the ammonium persulfate solution into the aniline solution , 5°C for 24 hours. The suction-filtered products were washed with deionized water until the filtrate was colorless, and dried at 50° C. to obtain polyaniline nanotubes.

[0019] Polyaniline nanotubes were loaded into alumina crucibles as carbon precursors, pre-oxidized in air at 200 °C for 2 hours, then placed in a horizontal carbonization furnace, heated under nitrogen atmosphere, and the heating rate was 1 °C min -1 , the temperature was raised from room temperature to 700° C., and kept for 2 hours to obtain polyaniline-based carbon nanotubes.

[0020] Take the obtained carbonized product, mix it with potassium hydroxide at a ratio of 1:4 and put it into a hig...

Embodiment 2

[0023] The preparation method of polyaniline carbon nanotubes is different from that of Example 1 in that during the activation process, the activation temperature is 600° C. and the temperature is kept for 2 hours to obtain nitrogen-doped porous carbon nanotubes.

[0024] as attached image 3 The nitrogen-doped porous carbon nanotubes obtained by activation treatment at 600℃ are shown at a current density of 1Ag -1 1000 times down cycle capacity is 292Fg -1 , at a current density of 10Ag -1 1000 cycles capacity of 248Fg -1 .

Embodiment 3

[0026] The preparation method of polyaniline carbon nanotubes is the same as that in Example 1, except that the activation temperature is 800° C., and the temperature is kept for 2 hours to obtain nitrogen-doped porous carbon nanotubes.

[0027] as attached image 3 The nitrogen-doped porous carbon nanotubes obtained by carbonization treatment at 800℃ are shown at a current density of 1Ag -1 The capacity is 312Fg for 1000 times of down cycle -1 , at a current density of 10Ag -1 1000 cycles capacity of 270Fg -1 .

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Abstract

The invention discloses a nitrogen-doped porous carbon nanotube material and its preparation method thereof. Polyaniline carbon nanotubes as precursors prepared from a chemical oxidation process are charred at a temperature of 600-900 DEG C in a nitrogen atmosphere to form polyaniline-based carbon nanotubes, and the polyaniline-based carbon nanotubes are activated at a temperature of 600-800 DEG C in a nitrogen atmosphere to form the nitrogen-doped porous carbon nanotubes. The nitrogen-doped porous carbon nanotube has excellent electrochemical performances, has a capacity of 392Fg<-1> after cycle 1000 times at current density of 1Ag<-1> and has a capacity of 327Fg<-1> after cycle 1000 times at current density of 10Ag<-1>.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a polyaniline porous nitrogen-containing carbon nanotube electrode material and a preparation method thereof. Background technique [0002] In the modern society with rapid social and economic development, high-tech smart products can be seen everywhere, including digital electronic products, smart cars, smart homes, electric products, etc. The power sources of these products also require high efficiency, long life, less pollution, and convenience. characteristic. Supercapacitors have the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. As the core of a supercapacitor is its electrode material, and carbon materials have attracted widespread attention because of their high conductivity, cheap and easy-to-obtain raw materials, and long cycle life. Common carbon materials inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00H01G11/26
CPCY02E60/13
Inventor 宋怀河刘海燕陈晓红
Owner BEIJING UNIV OF CHEM TECH
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