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Graphene/nickel oxide laminated-structure composite film and preparation method thereof

A nickel oxide layer and composite film technology, applied in nickel oxide/nickel hydroxide, layered products, etc., can solve the problems of complex preparation technology, and achieve the effects of easy process amplification, good electrical conductivity, strength, and adjustable scale

Active Publication Date: 2010-06-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation technology of existing graphene-based composite materials is relatively complicated, and a simple and easy preparation method for composite materials has an extremely important impact on the application of graphene-based composite materials

Method used

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  • Graphene/nickel oxide laminated-structure composite film and preparation method thereof
  • Graphene/nickel oxide laminated-structure composite film and preparation method thereof
  • Graphene/nickel oxide laminated-structure composite film and preparation method thereof

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Embodiment 1

[0020] The preparation of graphene oxide solution refers to literature (Chen C M, Yang Q H, Yang Y G, et al. Self-assembled free-standing graphite oxide membrane [J]. Advanced Materials, 21 (29), 3007, 2009.). Take 50 mg of graphite oxide, add 100 mL of water, and ultrasonicate for 2 hours with an ultrasonic power of 300 W to obtain a well-dispersed graphene oxide solution.

[0021] Measure 50mL of the graphene oxide solution prepared above and 10mL of 0.01mol / L nickel nitrate into a 100mL beaker, ultrasonically disperse in an ice-water bath for 1h, and the ultrasonic power is 240W, to obtain a well-dispersed graphene oxide / nickel nitrate aqueous solution. Then the solution was moved into a vacuum drying oven at 80° C., and kept for 3 days to obtain a graphene oxide / nickel nitrate composite film. in the description of the attached figure 1 For this reason, the macroscopic picture of the graphene oxide / nickel nitrate composite film, it can be seen from the figure that the film...

Embodiment 2

[0024] Put the graphene oxide / nickel nitrate composite film prepared in Example 1 into a high-temperature vacuum furnace, and perform heat treatment at 600°C under a protective atmosphere. The temperature was kept at ℃ for 3 hours, and finally a graphene / nickel oxide layered structure composite film was obtained. in the description of the attached image 3 For this reason, the TEM picture of the graphene / nickel oxide layered structure composite film can be seen from the figure that there are obvious metal stripes, which are identified as nickel oxide particles with a diameter of 15nm, and the number of layers of graphene is below 10 layers. The thickness of the film is 35nm, the specific capacitance reaches 600F / g, and the particle size of nickel oxide is 15nm.

Embodiment 3

[0026] Put the graphene oxide / nickel nitrate composite film prepared in Example 1 into a high-temperature vacuum furnace, and perform heat treatment at 700°C under a protective atmosphere. The temperature was kept at ℃ for 3 hours, and finally a graphene / nickel oxide layered structure composite film was obtained. The thickness of the film is 60nm, the specific capacitance reaches 360F / g, and the particle size of nickel oxide is 1nm.

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Abstract

The invention relates to a graphene / nickel oxide laminated-structure composite film and a preparation method thereof. The preparation method comprises the following steps: putting graphite oxide and a solvent in the proportion of 0.5-2:1 (mg / mL) into a beaker, and carrying out the ultrasonic treatment for 0.5-5 hours to obtain the finely disseminated graphene oxide solution; adding a nickel nitrate solution to the graphene oxide solution in the volume proportion of 1:1-10, continuing to carry out the ultrasonic treatment for 0.5-5 hours to obtain the graphene oxide / nickel nitrate solution; vacuum-drying at 70-90 DEG C to obtain the graphene oxide / nickel nitrate film; and carrying out the heat treatment on the film at 330-1000 DEG C in the protective atmosphere to obtain the graphene / nickel oxide laminated-structure composite film. The composite film has favorable electric properties and mechanical properties; and the specific capacitance can reach 180-1300 F / g, the thickness is 0.02-10 mu m, and the particle size of the nickel oxide in the film is 1-200 nm. The invention has the advantages of simple preparation process, easy operation, controllable film thickness, scalable shape, adjustable scale, low cost and easy amplification of technique.

Description

technical field [0001] The invention relates to a layered structure composite film of graphene and metal oxide and a preparation method thereof, belonging to the composite film preparation technology. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered in recent years, and it is one of the research hotspots in the field of carbonaceous materials and condensed matter physics. Graphene is the construction of zero-dimensional fullerene, one-dimensional carbon nanotubes, three-dimensional bulk graphite and other sp 2 The basic structural unit of hybrid carbon. Graphene has many strange properties. Graphene is a substance without an energy gap, showing metallicity; in single-layer graphene, each carbon atom has an unbonded electron, so it has very good conductivity; holes and electrons in graphene Separation from each other leads to the creation of new electron conduction phenomena, such as the irregular quantum Hall effect. Graphene has...

Claims

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Application Information

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IPC IPC(8): B32B9/04C01G53/04
Inventor 杨全红孙峰吕伟
Owner TIANJIN UNIV
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