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Preparation method and application thereof for vanadium pentoxide/oxidized graphene composite film

A composite technology of vanadium pentoxide and graphene, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problem of difficulty in applying flexible energy storage devices, poor uniformity of vanadium pentoxide and graphene composite films, Complicated preparation process and other issues to achieve the effect of reducing raw material consumption, easy control and operation, and shortening the process flow

Inactive Publication Date: 2017-07-11
SHANGHAI JIAO TONG UNIV
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  • Description
  • Claims
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Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the existing preparation process is complicated, the uniformity of the vanadium pentoxide and graphene composite film is poor, and it is difficult to apply to the problem of flexible energy storage devices

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  • Preparation method and application thereof for vanadium pentoxide/oxidized graphene composite film
  • Preparation method and application thereof for vanadium pentoxide/oxidized graphene composite film
  • Preparation method and application thereof for vanadium pentoxide/oxidized graphene composite film

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Embodiment 1

[0036] Such as image 3 Shown, a kind of preparation method of vanadium pentoxide / graphene composite membrane comprises the following steps:

[0037] (a) Preparation of vanadium pentoxide aqueous dispersion: at a room temperature of 20°C, add 0.9g of vanadium pentoxide powder into 63mL of double distilled water and stir, slowly add to the dispersion containing vanadium pentoxide Add 12mL of hydrogen peroxide solution with a mass fraction of 30% dropwise, continue to stir for 1 hour after adding the hydrogen peroxide solution, transfer the mixed solution to a 100mL hydrothermal reaction kettle and react at 180°C for 12 hours, cool the reaction kettle to five An aqueous dispersion of vanadium oxide, the concentration of the dispersion is 12 mg / mL, and the prepared vanadium pentoxide is vanadium pentoxide nanobelts. Such as figure 1 Shown in (a), the aqueous dispersion of the vanadium pentoxide of preparation is very stable, figure 1 (a) the dispersion liquid in the left bottl...

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Abstract

The invention provides a preparation method and an application thereof for a vanadium pentoxide / oxidized graphene composite film, and relates to the technical field of composite nano-materials. The preparation method comprises the following steps of (a) preparing a vanadium pentoxide aqueous dispersion; (b) preparing an oxidized graphene aqueous dispersion; (c) preparing a suction filtrate; (d) preparing a precursor of a vanadium pentoxide / oxidized graphene composite film; (e) preparing the vanadium pentoxide / oxidized graphene composite film. According to the technical scheme of the invention, the technical problems in the prior art that, existing preparation methods are complicated in process and prepared vanadium pentoxide / oxidized graphene composite films are poor in uniformity and are difficult to be applied to flexible energy-storage devices can be solved. The vanadium pentoxide aqueous dispersion and the oxidized graphene aqueous dispersion are mixed up, so that a flexible vanadium pentoxide / oxidized graphene composite film can be prepared through the pressure-reduced suction and filtration method, wherein the method is easy to control and operate. Meanwhile, the prepared vanadium pentoxide / oxidized graphene composite film can be applied to flexible capacitor devices. Therefore, the problem that the materials of traditional processes are hardly applied to flexible energy-storage devices can be solved.

Description

technical field [0001] The invention relates to the technical field of composite nanomaterials, in particular to a preparation method and application of a vanadium pentoxide / graphene oxide composite film. Background technique [0002] Vanadium pentoxide (V 2 o 5 ) is a common functional transition metal oxide, including applications in supercapacitors, catalysts, enamels, and magnetic materials, among others. In recent years, due to its outstanding electrochemical performance, vanadium pentoxide has been increasingly used as a supercapacitor material, including high-speed charge and discharge performance, wide measurable voltage range, good cycle durability, excellent It has the advantages of electrochemical reversibility, high stability, cheap and easy preparation. The capacitive properties of vanadium pentoxide mainly depend on charge storage processes, which usually occur on the surface within a few nanometers. Therefore, it is highly desirable to obtain a vanadium pe...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/46H01G11/86
CPCY02E60/13H01G11/32H01G11/46H01G11/86
Inventor 吴东清冯新亮刘海清黄涛
Owner SHANGHAI JIAO TONG UNIV
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