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Transition metal nitride/nitrogen-doped graphene nanometer composite material and preparation method and application thereof

A technology of nitrogen-doped graphene and nanocomposite materials, which is applied in the field of electrochemistry, can solve the problems of long preparation process, achieve simple process, novel structure, and improve the speed of electron conduction and ion conduction

Active Publication Date: 2018-01-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation process is relatively long, and transition metal nitrides are distributed on the surface of graphene

Method used

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  • Transition metal nitride/nitrogen-doped graphene nanometer composite material and preparation method and application thereof
  • Transition metal nitride/nitrogen-doped graphene nanometer composite material and preparation method and application thereof
  • Transition metal nitride/nitrogen-doped graphene nanometer composite material and preparation method and application thereof

Examples

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Embodiment 1

[0072] The present embodiment provides a kind of preparation method of vanadium nitride / nitrogen-doped graphene (VN / NG) nanocomposite material, and its specific preparation method is:

[0073] (1) 12g ammonium dicyanide, 0.4g glucose, 0.2g ammonium metavanadate (the mass ratio of the template precursor and the carbon source is 30:1, and the mass ratio of the carbon source and the metal source is 2:1) in a ball mill In 500r / min rotating speed, mix 30min to obtain the mixed material;

[0074] (2) Place the mixed material described in step (1) in an atmosphere furnace, feed nitrogen, the flow rate of the gas is 40mL / min, and the first stage of calcination is heated up to 600°C at a heating rate of 2.5°C / min, After 4 hours of heat preservation, the second stage of calcination was raised to 800°C at a heating rate of 2°C / min, held for 4 hours, and then cooled down to room temperature under the protection of nitrogen to obtain VN / NG nanocomposites.

[0075] In the VN / NG nanocomposi...

Embodiment 2

[0082] This embodiment provides a kind of preparation method of VN / NG nanocomposite material, and its specific preparation method is:

[0083] (1) 12g ammonium dicyanide, 0.6g glucose, 0.12g ammonium metavanadate (the mass ratio of the template precursor and the carbon source is 20:1, and the mass ratio of the carbon source and the metal source is 5:1) in a ball mill Mix 40min under the rotating speed of 550r / min to obtain the mixed material;

[0084] (2) Place the mixed material described in step (1) in an atmosphere furnace, feed nitrogen, the flow rate of the gas is 40mL / min, and the first stage of calcination is heated up to 650°C at a heating rate of 5°C / min, After 2 hours of heat preservation, the second stage of calcination was raised to 1200°C at a rate of 4°C / min, held for 1 hour, and then cooled down to room temperature under the protection of nitrogen to obtain VN / NG nanocomposites.

[0085] In the VN / NG nanocomposite prepared in this example, VN is embedded in the...

Embodiment 3

[0087] This embodiment provides a kind of preparation method of VN / NG nanocomposite material, and its specific preparation method is:

[0088] (1) 12g ammonium dicyanide, 0.3g glucose, 0.1g ammonium metavanadate (the mass ratio of the template precursor and the carbon source is 40:1, and the mass ratio of the carbon source and the metal source is 3:1) in a ball mill Mix 30min under the rotating speed of 600r / min to obtain the mixed material;

[0089] (2) Put the mixed materials described in step 1 in an atmosphere furnace, feed nitrogen gas, the flow rate of the gas is 400mL / min, the first stage of calcination is heated up to 600°C at a heating rate of 3°C / min, and kept for 4h In the second stage of calcination, the temperature was raised to 900°C at a heating rate of 2°C / min, kept for 4h, and then cooled down to room temperature under the protection of nitrogen to obtain VN / NG nanocomposites.

[0090] In the VN / NG nanocomposite material prepared in this example, VN is embedd...

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Abstract

The invention provides a transition metal nitride / nitrogen-doped graphene nanometer composite material and a preparation method and application thereof. In the composite material, transition metal nitride nanoparticles with sizes being 5-20 nanometers are embedded into a nitrogen-doped graphene framework, and the composite material is relatively large in specific area, contains mesopores uniformlydistributed and has favorable electrical conductivity. The preparation method of the composite material comprises the steps of (1) mixing a template precursor, a carbon source and a metal source to obtain a mixed material; and (2) placing the mixed material of the step (1) in an atmosphere furnace, and performing calcination in a non-oxidization atmosphere to obtain the transition metal nitride / nitrogen-doped graphene nanometer composite material. The composite material is used for the supercapacitor, a fuel cell or a lithium ion battery and has excellent application prospect. Compared with the prior art, the preparation method of the composite material is simple in process, low in equipment requirement and low in energy consumption, the raw material is low in cost, and mass production iseasy.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and specifically relates to a transition metal nitride / nitrogen-doped graphene nanocomposite material, a preparation method and application thereof. Background technique [0002] Transition metal nitrides are a class of intermetallic compounds. Because nitrogen atoms are embedded in the lattice gaps of metals, transition metal nitrides have the characteristics of ionic bonds, covalent bonds, and metal bonds, which are characterized by high melting point, high hardness, high thermal conductivity, excellent electronic conductivity, high Chemical stability, corrosion resistance and precious metal-like electronic structure and other characteristics. In recent years, transition metal nitrides have shown unique application value in energy storage fields such as supercapacitors, fuel cells, lithium-ion batteries, and metal-air batteries, and have received widespread attention, and their potential proper...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/32H01M4/36H01M4/58H01M4/583H01M4/86H01M10/0525B82Y30/00
CPCY02E60/10Y02E60/13Y02E60/50
Inventor 张红玲刘宏辉裴丽丽董玉明隋智通娄太平徐红彬张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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