Metal oxide /MXene two-dimensional nanometer compound, preparation method and application thereof

A two-dimensional nanotechnology, oxide technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of metal oxides not well combined, poor water solubility, etc., to improve the electrochemical Good performance, good conductivity, and the effect of improving performance

Inactive Publication Date: 2017-09-29
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most conductive materials only have good conductivity, poor water solubility, and cannot be well combined with metal oxides

Method used

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  • Metal oxide /MXene two-dimensional nanometer compound, preparation method and application thereof
  • Metal oxide /MXene two-dimensional nanometer compound, preparation method and application thereof
  • Metal oxide /MXene two-dimensional nanometer compound, preparation method and application thereof

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preparation example Construction

[0034] As one of the preferred embodiments, the preparation method specifically includes:

[0035] The metal oxide nanosheet solution and the MXene two-dimensional nanosheet solution are ultrasonically mixed to obtain a mixed solution, and the mixed solution is vacuum filtered to obtain a metal oxide / MXene two-dimensional nanocomposite.

[0036] Preferably, the mass ratio of the metal oxide nanosheets to the MXene two-dimensional nanosheets is 1:1˜9:1.

[0037] Further, the pressure of the vacuum filtration is about 5-20Mpa.

[0038] Further, the solvent includes alcohol solvents such as ultrapure water and ethanol, but is not limited thereto.

[0039] As one of the preferred embodiments, the lateral size of the metal oxide nanosheets is 1-2 μm.

[0040] Preferably, the metal oxide nanosheets include MnO 2 , ZnO, V 2 o 5 , Fe 3 o 4 etc., but not limited to this.

[0041] As one of the preferred embodiments, the lateral size of the MXene two-dimensional nanosheets is 1-...

Embodiment 1

[0053] The metal oxide and MXene nanosheet solution were ultrasonically mixed according to the mass ratio of 9:1, then vacuum filtered, and then the obtained composite electrode was transferred to the stainless steel mesh substrate by pressing the sheet for electrochemical analysis. test. The prepared flexible composite electrodes were tested in a three-electrode manner.

Embodiment 2

[0055] The metal oxide and MXene nanosheet solution were ultrasonically mixed according to the mass ratio of 4:1, then vacuum filtered, and then the obtained composite electrode was transferred to the stainless steel mesh substrate by pressing the sheet for electrochemical analysis. test. The prepared flexible composite electrode is tested in a three-electrode manner, and the CV and GCD curves of the three-electrode test can be found in Figure 4a with Figure 4b . This flexible composite electrode is further assembled into a flexible capacitor, see Figure 8a shown. Carry out flexible characterization to the flexible capacitor of this embodiment, its performance parameter sees Figure 8b shown.

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Abstract

The invention discloses a metal oxide/MXene two-dimensional nanocomposite, its preparation method and application. The metal oxide/MXene two-dimensional nanocomposite includes a layered structure composed of uniformly distributed and tightly connected metal oxide nanosheets and MXene two-dimensional nanosheets. The preparation method includes: directly mixing the metal oxide and MXene two-dimensional nanosheet solution to obtain a mixed solution, vacuum filtering the mixed solution to obtain a metal oxide/MXene two-dimensional nanocomposite, and preparing a composite Electrode, the obtained composite electrode is used as a flexible electrode of a flexible capacitor to improve the shortcoming of poor contact between active materials, and the obtained flexible capacitor has excellent mechanical and electrical properties.

Description

technical field [0001] The present invention relates to a method for preparing a metal oxide / MXene two-dimensional nanocomposite, in particular to a metal oxide / MXene two-dimensional nanocomposite and its preparation method, as well as its method for flexible capacitors, belonging to nano Composite technology field. Background technique [0002] With the development of the economy, the storage and conversion of renewable energy has attracted widespread attention. Capacitors, as an excellent storage device, are particularly prominent because of their simple structure, high power density, and long cycle life. It should be noted that the development of various flexible electronic devices has led to the emergence of flexible capacitors. Due to their own advantages, two-dimensional materials have occupied a place in the development of flexible capacitors. Among them, transition metal oxides stand out because of their high capacitance performance, but their poor conductivity lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/008B82Y30/00B82Y40/00
CPCH01G4/008B82Y30/00B82Y40/00
Inventor 耿凤霞刘卫红
Owner SUZHOU UNIV
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