Preparation method of two-dimensional inorganic layered compound/graphene composite material

A technology of layered compounds and composite materials, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, electrical components, etc., can solve the problem of high equipment requirements, achieve low equipment requirements, prevent agglomeration, and be easy to operate.

Inactive Publication Date: 2014-12-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high requirements on equipment, and nickel-aluminum double metal hydroxide may not be able to effectively grow on the reduced graphene filter cake

Method used

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  • Preparation method of two-dimensional inorganic layered compound/graphene composite material
  • Preparation method of two-dimensional inorganic layered compound/graphene composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 2.617g of analytically pure nickel nitrate and 1.125g of analytically pure aluminum nitrate in 50ml of deionized water, dissolve 2.4g of urea in 50ml of deionized water, mix the two solutions evenly, and transfer them to a high-pressure reactor at 100°C React for 24 hours, filter, wash, and vacuum-dry at 60°C to obtain nickel-aluminum double metal hydroxide. Add 1g of nickel-aluminum double hydroxide to 1000ml solution containing 1.5M sodium nitrate and 0.005M nitric acid, and blow nitrogen into the solution for 15min to drive off carbon dioxide. The above solution was shaken at room temperature for 1 day, and the obtained product was filtered, washed, and vacuum-dried at 60° C. to obtain an anion-exchanged nickel-aluminum double metal hydroxide. Mix the anion-exchanged nickel-aluminum double metal hydroxide and formamide solution at a mass ratio of 1:1, shake for 1 day, centrifuge at 2000rpm to take the supernatant, and obtain the stripped positively charged l...

Embodiment 2

[0023] Dissolve 1.746g of analytically pure nickel nitrate and 1.125g of analytically pure aluminum nitrate in 50ml of deionized water, dissolve 1.8g of urea in 50ml of deionized water, mix the two solutions evenly, and transfer them to an autoclave at 100°C React for 24 hours, filter, wash, and vacuum-dry at 60°C to obtain nickel-aluminum double metal hydroxide. Add 1g of nickel-aluminum double hydroxide to 1000ml solution containing 1.5M sodium nitrate and 0.005M nitric acid, and blow nitrogen into the solution for 15min to drive off carbon dioxide. The above solution was shaken at room temperature for 1 day, and the obtained product was filtered, washed, and vacuum-dried at 60° C. to obtain an anion-exchanged nickel-aluminum double metal hydroxide. Mix the anion-exchanged nickel-aluminum double metal hydroxide and formamide solution at a mass ratio of 1:1, shake for 1 day, centrifuge at 2000rpm to take the supernatant, and obtain the stripped positively charged layered nick...

Embodiment 3

[0025] Dissolve 2.619g of analytically pure cobalt nitrate and 1.125g of analytically pure aluminum nitrate in 50ml of deionized water, dissolve 2.4g of urea in 50ml of deionized water, mix the two solutions evenly, and transfer them to an autoclave at 120°C React for 24 hours, filter, wash, and vacuum dry at 60°C to obtain a cobalt-aluminum double metal hydroxide. Add 1g of cobalt-aluminum double metal hydroxide to 1000ml solution containing 1.5M sodium nitrate and 0.005M nitric acid, and blow nitrogen into the solution for 15 minutes to drive off carbon dioxide. The above solution was shaken at room temperature for 1 day, and the obtained product was filtered, washed, and vacuum-dried at 60° C. to obtain an anion-exchanged cobalt-aluminum double metal hydroxide. Mix the anion-exchanged cobalt-aluminum double hydroxide and formamide solution at a mass ratio of 1:5, shake for 1 day, centrifuge at 2000rpm to take the supernatant, and obtain the exfoliated layered cobalt-aluminu...

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Abstract

The invention discloses a preparation method of a two-dimensional inorganic layered compound/graphene composite material. The preparation method of the composite material comprises the following steps: preparing layered compound dispersion liquid with positive charges on the surface and oxidized graphene dispersion liquid with negative charges; mixing the two kinds of solution to perform self-assembling under an electrostatic interaction to obtain the ordered two-dimensional inorganic layered compound/graphene composite material assembled alternatively layer by layer; and carrying out reduction reaction on the composite material under certain conditions to obtain the two-dimensional inorganic layered compound/graphene composite material. According to the two-dimensional inorganic layered compound/graphene composite material, the two-dimensional inorganic layered compound and the graphene are assembled alternatively layer by layer under the electrostatic interaction; the required equipment has low requirement and is easy to operate; the graphene can provide a good electronic transmission channel for the inorganic layered material, so as to enhance the electrical conductivity of the inorganic layered material, prevent agglomeration, and achieve an important effect on the material structure stability. The two-dimensional inorganic layered compound/graphene composite material can be widely applied to the fields of catalytic and electrochemical energy storage fields.

Description

[0001] technical field [0002] The invention relates to a method for preparing a two-dimensional inorganic layered compound / graphene composite material, and belongs to the technical field of nanomaterials and their preparation. Background technique [0003] Two-dimensional inorganic layered compounds such as layered transition metal hydroxides, layered transition metal oxides, and layered metal chalcogenides have attracted a lot of attention because of their unique layered structures. Studies have shown that exfoliating these two-dimensional inorganic layers into thinner nanosheets that exist stably, these materials can exhibit more excellent performance, and have great application potential in electrochemical energy storage. However, poor electrical conductivity is the main reason limiting the applications of these materials. [0004] Compared with these semiconductors or even insulating two-dimensional inorganic layered compounds, graphene is a single atomic layer carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/139H01M4/96H01M4/88H01G11/86H01G11/26H01G11/32
CPCH01G11/26H01G11/30H01M4/366H01M4/625H01M4/9083H01M10/052Y02E60/10Y02E60/50
Inventor 刘洪涛胡俊艳刘文静
Owner CENT SOUTH UNIV
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