Preparation method and applications of bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material

An electrode material and nitrogen doping technology, applied in the fields of nanomaterials and electrochemistry, can solve the problems of insignificant influence of capacitance, and achieve the effects of being conducive to market promotion, easy to enlarge, and simple process

Active Publication Date: 2020-03-13
ANHUI LEOCH POWER SUPPLY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyridine-N and pyrrole-N have been shown to have the greatest effect on capacitance due to their degenerative reactions, but graphite-N and N-oxide have no significant effect on capacitance

Method used

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  • Preparation method and applications of bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material
  • Preparation method and applications of bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material
  • Preparation method and applications of bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of bamboo-shaped nitrogen-doped carbon nanotube electrode material includes the following steps:

[0037] S1. Add 3g of melamine and 15.12g of 37% formaldehyde solution in 14g of water, add 0.1mol / L of NaOH solution, adjust its pH to 8.5, and stir at 65°C until it is transparent to obtain MF. Polymer solution, as A solution.

[0038] S2, to 14g SiO 2 Ammonium hydroxide was added to the nanoparticle suspension, the pH of the suspension was adjusted to 8.5, and after 10 minutes of ultrasonic treatment, 0.11 g of a 37% formaldehyde solution was added as liquid B. The SiO 2 The density of the nanoparticle suspension is 1.4 g / mL.

[0039] S3. Add liquid B to liquid A drop by drop, stir for a few minutes, adjust the pH to 5.0 with glacial acetic acid, and collect MF / SiO after 10 minutes 2 , Wash with ethanol by centrifugation several times.

[0040] S4, prepared MF / SiO 2 Disperse in 50ml ethanol, stir vigorously at 65℃, add 1.13g CoCl 2 The solution was stirre...

Embodiment 2

[0052] S1. Add 3g of melamine and 15.12g of 37% formaldehyde solution in 14g of water, add 0.1mol / L NaOH aqueous solution, adjust its pH to 8.5, and stir at 65°C until it is transparent to obtain MF Polymer solution, as A solution.

[0053] S2, to 14g SiO 2 Ammonium hydroxide was added to the nanoparticle suspension, the pH of the suspension was adjusted to 8.5, and after 10 minutes of ultrasonic treatment, 0.11 g of a 37% formaldehyde solution was added as liquid B. The SiO 2 The density of the nanoparticle suspension is 1.4 g / mL.

[0054] S3. Add liquid B to liquid A drop by drop, stir for a few minutes, adjust the pH value to 5.0 with glacial acetic acid, collect MF / SiO2 after 10 minutes, and wash with ethanol for several times.

[0055] S4, prepared MF / SiO 2 Disperse in 50ml ethanol, stir vigorously at 65℃, add 0ml CoCl 2 The solution was stirred for 40 minutes and dried at 120°C for 2 hours to obtain a uniform precursor.

[0056] S5. The precursor is initially at 1℃min in a nitr...

Embodiment 3

[0060] S1. Add 3g of melamine and 15.12g of 37% formaldehyde solution in 14g of water, add 0.1mol / L of NaOH solution, adjust its pH to 8.5, and stir at 65°C until it is transparent to obtain MF. Polymer solution, as A solution.

[0061] S2, to 0ml SiO 2 Ammonium hydroxide was added to the nanoparticle suspension, the pH of the suspension was adjusted to 8.5, and 0.1 ml of formaldehyde solution was added after ultrasonic treatment for 10 minutes as liquid B.

[0062] S3. Add liquid B to liquid A drop by drop, stir for a few minutes, adjust the pH to 5.0 with glacial acetic acid, and collect MF / SiO after 10 minutes 2 , Wash with ethanol by centrifugation several times.

[0063] S4, prepared MF / SiO 2 Disperse in 50ml ethanol, stir vigorously at 65℃, add 1.13g CoCl 2 The solution was stirred for 40 minutes and dried at 120°C for 2 hours to obtain a uniform precursor. The CoCl 2 The concentration of the solution is 1mol / L.

[0064] S5. The precursor is initially at 1℃min in a nitrogen atm...

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Abstract

The invention relates to a preparation method and applications of a bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material, wherein the bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material with a high specific surface area is obtained by using SiO2 as a template, using a cobalt salt as a catalyst, using a melamine formaldehyde resin as a carbon precursorand a nitrogen source and using transition metal nanoparticles as a catalyst through the combination of an impregnation method, high-temperature pyrolysis and a chemical etching method. The bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material has high crystallinity and rapid electron transfer capability, so that the bamboo knot-like nitrogen-doped graphite carbon nanotube electrode material becomes a potential electrode material of a supercapacitor; and when the material is used as an electrode active material of a supercapacitor, the material has the characteristics ofhigh specific capacitance and high cycling stability.

Description

Technical field [0001] The invention relates to a preparation method and application of a bamboo-shaped nitrogen-doped graphite carbon nanotube electrode material, and belongs to the technical field of nanomaterials and electrochemistry. Background technique [0002] At present, most of the energy demand in many countries still comes from fossil fuels, which has led to the rapid depletion of existing fossil fuel reserves, and caused worrying greenhouse gas emissions, causing environmental pollution. Therefore, it is necessary and urgent to explore low-cost, green energy and related high-performance energy storage and conversion technologies. Among various energy storage and conversion technologies, electrochemical energy technology is the most reliable, practical and efficient technology for converting chemical energy into electrical energy and electrical energy into chemical energy. Currently, the most common electrochemical energy devices are batteries and supercapacitors. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/16H01G11/36H01G11/24
CPCC01B32/16H01G11/36H01G11/24Y02E60/13
Inventor 张久俊颜蔚马杰刘敏敏董李张树祥李江董升邵勤思李爱军
Owner ANHUI LEOCH POWER SUPPLY
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