Molybdenum sulfide/graphene/carbon nanofiber composite material and preparation method thereof

A technology of carbon nanofibers and composite materials, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, electrical components, etc., can solve the problems that the excellent properties of pure molybdenum sulfide cannot be fully utilized, poor conductivity, etc., and achieve experimental results The effect of ingenious design, high specific surface area, and easy operation

Inactive Publication Date: 2018-06-08
FUDAN UNIV
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  • 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 agglomerates further inhibits the exposure of the active edge, coupled with its poor conductivity, pure sulfide The excellent properties of molybdenum are often not fully utilized

Method used

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

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Effect test

Embodiment 1

[0035] Embodiment 1, the present embodiment comprises the following steps:

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

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

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

[0039] (4) Mince the pre-oxidized 100 mg polyacrylonitrile nanofiber membrane and put into 20 mL of 1 mg mL -1 Carry out mechanical stirring in graphene oxide solution, prepare uniform graphe...

Embodiment 2

[0045] Example 2, change the quality of ammonium thiomolybdate in Example 1 to 10 mg, the rest 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, the quality of the ammonium thiomolybdate in Example 1 is changed to 30 mg, the rest are the same as in Example 1, and the finally obtained composite material 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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Patent Type & Authority Patents(China)
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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