Molybdenum sulfide/graphene/carbon nano fiber composite material and preparation method thereof

A carbon nanofiber and composite material technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, electrical components, etc. Ingenious design, high specific surface area, and the effect of inhibiting agglomeration

Inactive Publication Date: 2016-02-03
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure molybdenum sulfide is easy to agglomerate, and it preferentially grows the inert inner layer structure instead of the active sheet edge, and a large number of ...

Method used

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  • Molybdenum sulfide/graphene/carbon nano fiber composite material and preparation method thereof
  • Molybdenum sulfide/graphene/carbon nano fiber composite material and preparation method thereof
  • Molybdenum sulfide/graphene/carbon nano fiber composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 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) Chopped 100mg of pre-oxidized polyacrylonitrile nanofiber membrane and put into 20mL of 1mgmL -1 Carry out mechanical stirring in graphene oxide solution, prepare uniform graphene oxide / polyacrylonitrile nano...

Embodiment 2

[0045] Example 2, Change the quality of ammonium thiomolybdate in Example 1 to 10mg, all the other are the same as Example 1, and the composite material finally obtained is denoted as MoS 2 / GNS / CNF-2. Implementation results: molybdenum sulfide nanosheets grow uniformly on graphene / carbon nanofiber aerogels; with MoS 2 / GNS / CNF-1, denoted as MoS 2 Molybdenum sulfide nanosheets in / GNS / CNF-2 have smaller sheets and less content.

Embodiment 3

[0046] Example 3, Change the quality of the ammonium thiomolybdate in Example 1 to 30mg, all the other are the same as Example 1, and the composite material finally obtained is denoted as MoS 2 / CNF / G-3. Implementation results: molybdenum sulfide nanosheets grow uniformly on graphene / carbon nanofiber aerogels; with MoS 2 / GNS / CNF-1, denoted as MoS 2 Molybdenum sulfide nanosheets in / GNS / CNF-3 have larger sheets and more content.

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Abstract

The invention belongs to the technical field of transition metal sulfide-carbon materials, and particularly relates to a molybdenum sulfide/graphene/carbon nano fiber composite material and a preparation method thereof. The preparation method includes the steps that polyacrylonitrile nano fibers are prepared through electrostatic spinning, oxidized graphene/polyacrylonitrile nano fiber aerogel is prepared through mechanical stirring and freezing drying, then graphene/carbon nano fiber aerogel is prepared through high-temperature carbonization, and finally, molybdenum sulfide nanosheets grow in situ on the graphene/carbon nano fiber aerogel through the one-step hydrothermal method. The molybdenum sulfide/graphene/carbon nano fiber composite material prepared through the method has the advantages that the material has a three-dimensional porous space structure, conductivity is good and chemical properties are stable, and can serve as an ideal high-performance electro-catalysis material and electrode materials of new energy devices such as lithium ion batteries and solar batteries.

Description

technical field [0001] The invention belongs to the technical field of transition metal sulfide-carbon materials, and in particular relates to a molybdenum sulfide / graphene / carbon nanofiber composite material and a preparation method thereof. technical background [0002] Graphene has excellent physical and chemical properties, such as high electrical conductivity, excellent mechanical properties, high specific surface area, light weight and low density, and good chemical stability. These special properties make it widely used in catalyst supports, polymer nanocomposites, flexible substrate materials for energy conversion and storage devices, etc. It is considered to be one of the top ten new materials with the greatest potential in the future. However, graphene sheets are easy to stack, so that the excellent properties of graphene cannot be fully utilized. This patent adopts electrospinning process, mechanical stirring and freeze-drying method to combine graphene oxide and...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01G11/36H01G11/30H01G11/86
CPCH01G11/30H01G11/36H01G11/86H01M4/362H01M4/5815H01M4/583H01M4/625Y02E60/10
Inventor 刘天西张龙生樊玮缪月娥左立增顾华昊
Owner FUDAN UNIV
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