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Nitrogen-doped micro-pore carbon spheres for super-capacitor electrode material and preparation method thereof

A nitrogen-doped microporous carbon and supercapacitor technology, which is applied in hybrid capacitor electrodes, carbon preparation/purification, chemical instruments and methods, etc., can solve the problems of complex synthesis process, low specific capacitance, low energy density, long reaction time, etc. , to achieve the effect of simple operation, high monodispersity and short reaction time

Inactive Publication Date: 2018-09-25
夏辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its synthesis process is complicated, the reaction time is long (usually more than 48 hours), and many of these nitrogen-doped carbon spheres show limited specific capacitance and low energy density.

Method used

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  • Nitrogen-doped micro-pore carbon spheres for super-capacitor electrode material and preparation method thereof
  • Nitrogen-doped micro-pore carbon spheres for super-capacitor electrode material and preparation method thereof
  • Nitrogen-doped micro-pore carbon spheres for super-capacitor electrode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0043] This embodiment provides a nitrogen-doped microporous carbon sphere, the preparation method of which comprises:

[0044] a. Add absolute ethanol and deionized water into a beaker at a volume ratio of 1:1 to form a mixed solution of 80 mL; weigh 0.3 g of tri-block copolymer F108 and add it to the mixed solution at a speed of 2000r / min Stir for 20min;

[0045] b. Take 3mL of ammonia water (mass fraction is 25%), 1.2g of phenol and 4.5mL of formaldehyde were added to the solution obtained in step a, and stirred at a speed of 2000r / min for 30min at room temperature to obtain a mixed base solution;

[0046] c. Transfer the mixed base liquid to a 100mL polytetrafluoroethylene reactor, react at 170°C for 6 hours, cool, wash the product with alcohol and water, and dry at 80°C for 12 hours to obtain phenolic resin balls;

[0047] d. Put the phenolic resin ball in N 2 carbonization at 700°C for 3 h under atmosphere protection, and then in N 2 Cool to room temperature under atm...

Embodiment 2

[0051] This embodiment provides a nitrogen-doped microporous carbon sphere, the preparation method of which comprises:

[0052] a. Add absolute ethanol and deionized water to a beaker at a volume ratio of 4.3:1 to form a 80mL mixed solution; weigh 0.5g of triblock copolymer F108 and add it to the mixed solution at a speed of 2000r / min Stir for 20min;

[0053] b. Take 3mL of ammonia water (mass fraction is 25%), 1.2g of phenol and 4.5mL of formaldehyde were added to the solution obtained in step a, and stirred at a speed of 2000r / min for 30min at room temperature to obtain a mixed base solution;

[0054] c. Transfer the mixed base liquid to a 100mL polytetrafluoroethylene reactor, react at 170°C for 6 hours, cool, wash the product with alcohol and water, and dry at 80°C for 12 hours to obtain phenolic resin balls;

[0055] d. Put the phenolic resin ball in N 2 carbonization at 700°C for 3 h under atmosphere protection, and then in N 2 Cool to room temperature under atmospher...

Embodiment 3

[0059] This embodiment provides a nitrogen-doped microporous carbon sphere, the preparation method of which comprises:

[0060] a. Add absolute ethanol and deionized water into a beaker at a volume ratio of 1:2.3 to form a 80mL mixed solution; weigh 0.4g of triblock copolymer F127 and add it to the mixed solution at a speed of 3000r / min Stir for 10 minutes;

[0061] b. Take 3mL of ammonia water (mass fraction is 25%), 1.2g of phenol and 4.5mL of formaldehyde were added to the solution obtained in step a, and stirred at a speed of 2000r / min for 20min at room temperature to obtain a mixed base solution;

[0062] c. Transfer the mixed base liquid to a 100mL polytetrafluoroethylene reactor, react at 150°C for 9 hours, cool, wash the product with alcohol and water, and dry to obtain phenolic resin balls;

[0063] d. Put the phenolic resin ball in N 2 carbonization at 500°C for 4 h under atmosphere protection, and then 2 Cool to room temperature under atmosphere to obtain nitroge...

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Abstract

The invention provides nitrogen-doped micro-pore carbon spheres for a super-capacitor electrode material and a preparation method thereof and relates to the field of polymers. The preparation method comprises the following steps: uniformly dispersing a template agent, phenol, formaldehyde and ammonia water in an alcohol solution to obtain a mixed base solution; putting the mixed base solution intoa sealed container and carrying out polymerization reaction to obtain phenolic resin spheres; after drying the phenolic resin spheres at 60 to 100 DEG C, carbonizing under an inert atmosphere to obtain a carbonized product; mixing the carbonized product and KOH; activating at 700 to 900 DEG C for 0.7 to 1.3h under the inert atmosphere, so as to obtain the nitrogen-doped micro-pore carbon spheres.The nitrogen-doped micro-pore carbon spheres prepared by the method have the advantages of high nitrogen doping amount, high sphericity degree, good dispersity and large specific surface area; the obtained nitrogen-doped micro-pore carbon spheres are used as the super-capacitor electrode material, have high specific capacitance and excellent circulation stability and have a wide application prospect.

Description

technical field [0001] The invention relates to the field of inorganic carbon materials, in particular to a nitrogen-doped microporous carbon sphere used as an electrode material for a supercapacitor and a preparation method thereof. Background technique [0002] As a new type of green energy storage device, supercapacitor has the characteristics of large capacity, high power density, long cycle life and environmental protection. It has been widely used in new energy vehicles, military, rail transit, aerospace and other fields. Electrode materials are the core components of supercapacitors and play a key role in the performance of supercapacitors. Nitrogen-doped carbon spheres have unique structural properties, large specific surface area, well-developed pore structure, good chemical stability and excellent electrochemical performance, and have become the material of choice for the preparation of supercapacitor electrodes. [0003] At present, the methods for synthesizing n...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/05H01G11/24H01G11/42H01G11/44
CPCC01B32/05C01B32/348H01G11/24H01G11/42H01G11/44Y02E60/13
Inventor 夏辉梁忠冠张洛蒙
Owner 夏辉
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