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Preparation method of N-doped carbon nanotube/nickel cobalt oxide/N-doped porous carbon

A technology of cobalt nickel oxide and carbon nanotubes, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of coke demand decline, environmental pollution, etc., and achieve the improvement of capacitance performance and conductivity Excellent performance, improved wetting characteristics and electrochemical activity

Active Publication Date: 2018-08-17
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method of N-doped carbon nanotube/nickel cobalt oxide/N-doped porous carbon
  • Preparation method of N-doped carbon nanotube/nickel cobalt oxide/N-doped porous carbon
  • Preparation method of N-doped carbon nanotube/nickel cobalt 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" in Patent No. 201510464778.2, specifically for:

[0053] Step 101, uniformly mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (37% in mass concentration) and 60 mL of water to obtain a mixed solution, add 10 g of coal powder to the mixed solution, stir and swell at 35° C. for 3 h 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 dropwise to the swollen coal sample described in step 101 under stirring in an ice-water bath at 1° C. at a rate of 2 mL / min. After the addition is complete, Continue to stir for 8 hours under the condition of an ice-water bath at 1°C, filter with suction, wash the filter cake obtained by suction filtration, then va...

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" in Patent No. 201510464778.2, specifically for:

[0068] Step 101, uniformly mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (37% in mass concentration) and 60 mL of water to obtain a mixed solution, add 10 g of coal powder to the mixed solution, stir and swell at 30° C. for 3 h 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 dropwise to the swollen coal sample described in step 101 in a 3° C. ice-water bath with stirring at a rate of 2 mL / min. After the dropwise addition is completed, Continue to stir for 7 hours under the condition of an ice-water bath at 3°C, filter with suction, wash the filter cake obtained by suction filtration, th...

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" in Patent No. 201510464778.2, specifically for:

[0082] Step 101, uniformly mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (37% in mass concentration) and 60 mL of water to obtain a mixed solution, add 10 g of coal powder to the mixed solution, stir and swell at 25° C. for 3 h 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 dropwise to the swollen coal sample described in step 101 under agitation in an ice-water bath at 5° C. at a rate of 2 mL / min. After the dropwise addition is completed, Continue to stir for 6 hours under the condition of ice-water bath at 5°C, filter with suction, wash the filter cake obtained by suction filtration,...

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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 intersecting technical field of energy storage materials and coal deep processing, and specifically relates to a preparation method of N-doped carbon nanotube / cobalt-nickel oxide / N-doped porous carbon. Background technique [0002] Supercapacitors not only have the characteristics of high power density, short charging time, high charge and discharge efficiency, long cycle life, and can work at ultra-low temperature, but also have the energy density closer to lithium batteries, so they become energy Research hotspots in the field of storage. 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 materials with electr...

Claims

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Application Information

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