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Tungsten disulfide/carbon nanofiber/graphene composite material and preparation method thereof

A carbon nanofiber and graphene composite technology, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the excellent properties of pure tungsten disulfide cannot be fully utilized, poor conductivity, etc. problem, to achieve the effect of ingenious experimental design, good flexibility and easy operation

Inactive Publication Date: 2016-02-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure tungsten disulfide is easy to agglomerate, and it preferentially grows the inert inner layer structure instead of the active sheet edge, and a large number of agglomerates further inhibits the exposure of the active edge, coupled with its poor conductivity, pure The excellent properties of tungsten disulfide are often not fully utilized

Method used

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  • Tungsten disulfide/carbon nanofiber/graphene composite material and preparation method thereof
  • Tungsten disulfide/carbon nanofiber/graphene composite material and preparation method thereof
  • Tungsten disulfide/carbon nanofiber/graphene composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1, This embodiment includes the following steps:

[0036] (1) Add 1g polyacrylonitrile powder to 5mL N,N- In the dimethylformamide solvent, keep stirring to prepare a uniform viscous dispersion;

[0037](2) The obtained polyacrylonitrile dispersion is subjected to electrospinning, and the adjustment process parameters are: electrostatic field voltage 20kV, spinning speed 0.3mmmin -1 , the receiving distance is 20cm, and the polyacrylonitrile nanofiber membrane is prepared;

[0038] (3) Pre-oxidize the obtained polyacrylonitrile spun membrane in an air atmosphere, the pre-oxidation temperature is 250°C, and the heating rate is 1°C min -1 , the pre-oxidation time is 1.5h, and the pre-oxidized polyacrylonitrile nanofiber membrane is prepared;

[0039] (4) The resulting pre-oxidized polyacrylonitrile nanofiber membrane in 1mgmL -1 Soak in graphene oxide solution for 24h to prepare polyacrylonitrile nanofiber / graphene oxide composite film;

[0040] (5) Carr...

Embodiment 2

[0044] Embodiment 2, Change the quality of ammonium thiotungstate in Example 1 to 10 mg, and the rest are the same as in Example 1. The composite material finally obtained is denoted as WS 2 / CNF / G-2. Implementation results: tungsten disulfide nanosheets grow uniformly on carbon nanofibers / graphene; with WS 2 / CNF / G-1 compared to WS 2 The tungsten disulfide nanosheets in / CNF / G-2 have smaller sheets and less content.

Embodiment 3

[0045] Embodiment 3, Change the quality of ammonium thiotungstate in Example 1 to 30 mg, and the rest are the same as in Example 1. The composite material finally obtained is denoted as WS 2 / CNF / G-3. Implementation results: tungsten disulfide nanosheets grow uniformly on carbon nanofibers / graphene; with WS 2 / CNF / G-1 compared to WS 2 The tungsten disulfide nanosheets in / CNF / G-3 have larger sheets and more content, and a small amount of tungsten disulfide aggregates appear.

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Abstract

The invention belongs to the technical field of transitional metal sulfide-carbon materials, and particularly relates to a tungsten disulfide / carbon nanofiber / graphene composite material and a preparation method thereof. The preparation method comprises the following steps: preparing a polyacrylonitrile nanofiber membrane in an electrostatic spinning manner; wrapping a polyacrylonitrile nanofiber with a graphene oxide through a solution immersion method; preparing a carbon nanofiber / graphene composite membrane through a high-temperature carbonization; and finally growing a tungsten disulfide nanosheet on the carbon nanofiber / graphene in situ through a one-step solvothermal method. The prepared tungsten disulfide / carbon nanofiber / graphene composite material has the advantages of stable chemical property, good conductivity, excellent mechanical property and the like, and can be used as an ideal high-performance electric catalytic material and an electrode material for new energy devices of a lithium-ion battery, a solar battery and the like.

Description

technical field [0001] The invention belongs to the technical field of transition metal sulfide-carbon materials, and in particular relates to a tungsten disulfide / carbon nanofiber / graphene composite material and a preparation method thereof. technical background [0002] Carbon nanofibers inherit the excellent physical and chemical properties of carbon nanomaterials, such as excellent mechanical properties, high specific surface area and good chemical stability. These special properties make them widely used in catalyst supports, polymer nanocomposites, energy Flexible substrate materials for conversion and storage devices, etc. Electrospinning is a simple and effective technology for preparing carbon nanofibers. Electrospun carbon nanofibers with three-dimensional porous structure and high specific surface area can be prepared by spinning polymer solution through high-voltage electrostatics, followed by pre-oxidation and high-temperature carbonization. Fiber membrane. Th...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01L31/0224B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01L31/022425H01M4/366H01M4/5815H01M4/625H01M4/628H01M10/0525Y02E10/50Y02E60/10
Inventor 刘天西张龙生樊玮缪月娥张由芳左立增顾华昊
Owner FUDAN UNIV
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