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A kind of preparation method of n-doped carbon nanotube/cobalt-nickel oxide/n-doped porous carbon

A cobalt nickel oxide, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as decreased coke demand, environmental pollution, etc., to improve capacitance performance, electrical conductivity, etc. Excellent performance and the effect of reducing internal resistance

Active Publication Date: 2018-12-21
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, coke demand is down due to lower steel production
In addition, the tar and gas produced in this process also caused serious pollution to the environment due to improper handling

Method used

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  • A kind of preparation method of n-doped carbon nanotube/cobalt-nickel oxide/n-doped porous carbon
  • A kind of preparation method of n-doped carbon nanotube/cobalt-nickel oxide/n-doped porous carbon
  • A kind of preparation method of n-doped carbon nanotube/cobalt-nickel oxide/n-doped porous carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The coal-based polyaniline used in this example was prepared by in-situ polymerization according to the preparation method of coal-based polyaniline disclosed in "A N-doped porous carbon / NiO composite material and its preparation method" with the patent number 201510464778.2. for:

[0053] Step 101: Mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (with a mass concentration of 37%) and 60 mL of water to obtain a mixed solution, add 10 g of coal powder to the mixed solution, and stir and swell at 35° C. for 3 hours to obtain a swollen coal sample;

[0054] Step 102: Add 80 mL of ammonium persulfate aqueous solution with a concentration of 0.30 g / mL to the swollen coal sample described in step 101 in an ice water bath at 1° C. with stirring at a rate of 2 mL / min. After the addition is complete Continue to stir for 8 hours in an ice-water bath at 1°C, filter with suction, wash the filter cake obtained by suction filtration, and then vacuum dry the washed filter cake...

Embodiment 2

[0067] The coal-based polyaniline used in this example was prepared by in-situ polymerization according to the preparation method of coal-based polyaniline disclosed in "A N-doped porous carbon / NiO composite material and its preparation method" with the patent number 201510464778.2. for:

[0068] Step 101: Mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (with a mass concentration of 37%) and 60 mL of water to obtain a mixed solution, add 10 g of coal powder to the mixed solution, and stir and swell at 30° C. for 3 hours to obtain a swollen coal sample;

[0069] Step 102: Add 80 mL of ammonium persulfate aqueous solution with a concentration of 0.30 g / mL to the swelled coal sample described in step 101 in an ice water bath at 3°C ​​under stirring conditions, with a dropping rate of 2 mL / min. After the addition is complete Continue to stir for 7 hours in an ice-water bath at 3°C, filter by suction, wash the filter cake obtained by suction, and then vacuum-dry the washed ...

Embodiment 3

[0081] The coal-based polyaniline used in this example was prepared by in-situ polymerization according to the preparation method of coal-based polyaniline disclosed in "A N-doped porous carbon / NiO composite material and its preparation method" with the patent number 201510464778.2. for:

[0082] Step 101: Mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (with a mass concentration of 37%) and 60 mL of water to obtain a mixed solution, add 10 g of coal powder to the mixed solution, and stir and swell at 25° C. for 3 hours to obtain a swollen coal sample;

[0083] Step 102. Add 80 mL of ammonium persulfate aqueous solution with a concentration of 0.30 g / mL to the swollen coal sample described in step 101 in an ice water bath at 5°C under stirring conditions, with a dropping rate of 2 mL / min. After the addition is complete Continue to stir for 6 hours in an ice-water bath at 5°C, filter with suction, wash the filter cake obtained by the suction filter, then vacuum dry the ...

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Abstract

The invention discloses a preparation method of N-doped carbon nanotube / nickel cobalt oxide / N-doped porous carbon. The method comprises the steps of (1) adding coal-based polyaniline to a nickel acetate solution to obtain paste A; (2) adding the coal-based polyaniline to a cobalt oxalate suspension to obtain paste B; (3) pyrolyzing the paste A; (4) pyrolyzing the paste B; (5) mixing products, which are collected through twice pyrolysis, on a quartz plate evenly and marking quartz plate products; (6) mixing a quartz boat product A, a quartz boat product B and the quartz plate products evenly toobtain mixed powder; (7) carrying out hydrothermal reaction to obtain a black sediment; and (8) washing, drying and burning to obtain N-doped carbon nanotube / nickel cobalt oxide / N-doped porous carboncomposite powder. The prepared N-doped carbon nanotube / nickel cobalt oxide / N-doped porous carbon composite powder has relatively low internal resistance and charge transfer resistance, relatively high specific capacitance and relatively good rate characteristics and cycling stability.

Description

Technical field [0001] The invention belongs to the cross technical field of energy storage materials and coal deep processing, and specifically relates to a preparation method of N-doped carbon nanotubes / cobalt nickel oxide / N-doped porous carbon. Background technique [0002] Supercapacitors not only have the characteristics of electrostatic capacitors high power density, short charging time, high charge and discharge efficiency, long cycle life, and ability to work at ultra-low temperatures, but also have an energy density close to lithium batteries, so they become energy Research hotspots in the storage field. The electrode materials of supercapacitors directly affect the performance of supercapacitors, so the preparation of electrode materials with high specific capacitance, high specific power, high specific energy and stable charge and discharge becomes the key to solving the problem. At present, the electrode materials of commercial supercapacitors are mainly carbon mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/34H01G11/36H01G11/44H01G11/46B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 汪晓芹杨玉飞李侃社
Owner XIAN UNIV OF SCI & TECH
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