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Nitrogen-doped graphene/cobalt ferrite/polyaniline nanometer composite material and preparation method thereof

A technology of nitrogen-doped graphene and nanocomposite materials, which is applied in the field of nitrogen-doped graphene/cobalt ferrite/polyaniline nanocomposite materials and their preparation, achieving low environmental pollution, improved electrochemical performance, and excellent electrochemical performance Effect

Active Publication Date: 2014-05-14
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, nitrogen-doped graphene / cobalt ferrite / polyaniline nanocomposites have not been reported

Method used

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  • Nitrogen-doped graphene/cobalt ferrite/polyaniline nanometer composite material and preparation method thereof
  • Nitrogen-doped graphene/cobalt ferrite/polyaniline nanometer composite material and preparation method thereof
  • Nitrogen-doped graphene/cobalt ferrite/polyaniline nanometer composite material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0032] Implementation example 1: Preparation of nitrogen-doped graphene / cobalt ferrite / polyaniline nanocomposite material with a nitrogen content of 1% (the mass ratio of graphite oxide, cobalt ferrite and polyaniline is 1:1:1) method, including the following steps:

[0033] In the first step, ultrasonically disperse graphite oxide with a content of 50 mg in 50 mL of absolute ethanol to obtain a uniform graphene oxide solution, and the ultrasonic time is 1 h;

[0034] In the second step, dissolve 0.1722g of ferric nitrate and 0.062g of cobalt nitrate in 20mL of ethanol and stir for 10min;

[0035] In the third step, the dissolved mixed metal salt solution is poured into the graphene oxide solution obtained in the first step, and stirred for 10 minutes to make it evenly mixed;

[0036] In the fourth step, 5 g of urea was added to the obtained mixed solution, and stirred again for 30 minutes to make it uniformly dispersed;

[0037] The fifth step is to transfer the uniformly m...

Embodiment 2

[0043] Implementation Example 2: Preparation of nitrogen-doped graphene / cobalt ferrite / polyaniline nanocomposite material with a nitrogen content of 1.5% (the mass ratio of graphite oxide, cobalt ferrite and polyaniline is 1:1:2) method, including the following steps:

[0044] In the first step, ultrasonically disperse graphite oxide with a content of 80 mg in 60 mL of absolute ethanol to obtain a uniform graphene oxide solution, and the ultrasonic time is 2 hours;

[0045] In the second step, dissolve 0.2756g of ferric nitrate and 0.0993g of cobalt nitrate in 10mL of ethanol and stir for 20min;

[0046] In the third step, the dissolved mixed metal salt solution is poured into the graphene oxide solution obtained in the first step, and stirred for 20 minutes to make it evenly mixed;

[0047] In the fourth step, 12g of urea was added to the obtained mixed solution, and stirred again for 45 minutes to make it evenly dispersed;

[0048] The fifth step is to transfer the uniform...

Embodiment 3

[0054] Implementation Example 3: Preparation of nitrogen-doped graphene / cobalt ferrite / polyaniline nanocomposite material with a nitrogen content of 2% (the mass ratio of graphite oxide, cobalt ferrite and polyaniline is 1:1:4) method, including the following steps:

[0055] In the first step, ultrasonically disperse graphite oxide with a content of 100 mg in 50 mL of absolute ethanol to obtain a uniform graphene oxide solution, and the ultrasonic time is 4 h;

[0056] In the second step, dissolve 0.3444g ferric nitrate and 0.1241g cobalt nitrate in 20mL ethanol and stir for 30min;

[0057] In the third step, the dissolved mixed metal salt solution is poured into the graphene oxide solution obtained in the first step, and stirred for 30 minutes to make it evenly mixed;

[0058] The fourth step is to add 20g of urea into the obtained mixed solution, and stir again for 60min to make it evenly dispersed;

[0059] The fifth step is to transfer the uniformly mixed mixed solution ...

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Abstract

The invention discloses a nitrogen-doped graphene / cobalt ferrite / polyaniline nanometer composite material and a preparation method thereof. The preparation method comprises the following steps of carrying out ultrasonic dispersion on graphite oxide in ethanol; then adding cobalt nitrate and ferric nitrate to the ethanol; adding a dissolved metal salt solution to a solution, then carrying out the ultrasonic dispersion again; adding carbamide to a mixed solution, and stirring for dissoluton; finally carrying out hydro-thermal synthesis reaction on the mixed solution; after the reaction is finished, centrifugalizing, washing and drying a product to obtain a nitrogen-doped graphene / cobalt ferrite nanometer composite material; carrying out the ultrasonic dispersion again on the obtained composite material in absolute ethyl alcohol; adding a phenylamine monomer under the condition of ice bath, uniformly stirring, and then dropwise adding doping acid and an oxidizing agent; centrifugalizing, washing and drying an obtained product to obtain the nitrogen-doped graphene / cobalt ferrite / polyaniline nanometer composite material. According to the invention, the electrochemical property of the composite material is enhanced to a large degree through the compounding of the graphene, cobalt ferrite and polyaniline, the specific capacitance achieves 1318 F / g, and the specific capacitance is damped by about 5% after the composite material is circulated for 5000 circles.

Description

technical field [0001] The invention belongs to the field of nanocomposite material preparation, and in particular relates to a nitrogen-doped graphene / cobalt ferrite / polyaniline nanocomposite material and a preparation method thereof. Background technique [0002] In order to solve the current problems of environmental pollution and energy depletion, the demand for renewable energy and energy storage devices is increasing day by day. Supercapacitors, as one of the energy storage devices, have also aroused an upsurge of research. The performance of supercapacitors has a great relationship with electrode materials. At present, electrode materials are mainly divided into carbon materials, metal oxides and conductive polymers. [0003] As a new type of carbon material, graphene has begun to be used in supercapacitors, lithium-ion batteries and other fields due to its large specific surface area, excellent electrical conductivity and mechanical strength. As a carbon material, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K9/04C08K9/02C08K3/04C08K3/24C08L73/02
CPCC08G73/0266C08K3/04C08K3/24C08K9/04C08L2203/20C08L79/02
Inventor 郝青丽王文娟夏锡锋雷武姚超汪信
Owner NANJING UNIV OF SCI & TECH
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