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Cobalt zinc sulfide/graphene/carbon nanofiber composite material and preparing method thereof

A carbon nanofiber, graphene composite technology, applied in the direction of carbon fiber, chemical instruments and methods, fiber processing, etc., can solve the problem that the active site cannot be fully exposed, the cobalt and zinc sulfide particles are easy, affect the catalytic properties and energy storage cycle stability To solve problems such as sexuality, the experimental design is ingenious, the preparation process is simple, and the operation is easy.

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 cobalt-zinc sulfide particles are prone to agglomeration, which prevents the active sites from being fully exposed, seriously affecting its catalytic properties and cycle stability of energy storage.

Method used

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  • Cobalt zinc sulfide/graphene/carbon nanofiber composite material and preparing method thereof
  • Cobalt zinc sulfide/graphene/carbon nanofiber composite material and preparing method thereof
  • Cobalt zinc sulfide/graphene/carbon nanofiber composite material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, This embodiment includes the following steps:

[0034] (1) Add 1g polyacrylonitrile powder to 5mL N,N- In the dimethylformamide solvent, keep stirring to prepare a uniform viscous dispersion;

[0035] (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;

[0036](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;

[0037] (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;

[0038] (5) Carr...

Embodiment 2

[0041] Embodiment 2, Change the quality of cobalt nitrate in Example 1 to 290mg, the quality of zinc nitrate to 145mg, and the quality of thiourea to 300mg, the rest are the same as in Example 1, and the composite material finally obtained is denoted as ZCS / GNS / CNF -2. Implementation results: Cobalt-zinc sulfide nanoparticles grow uniformly on graphene / carbon nanofibers; compared with ZCS / GNS / CNF-1, the sheets of cobalt-zinc sulfide nanoparticles in ZCS / GNS / CNF-2 are smaller , the content is also less.

Embodiment 3

[0042] Embodiment 3, Change the quality of the cobalt nitrate in embodiment 1 into 1160mg, the quality of zinc nitrate into 580mg, the quality of thiourea into 1200mg, all the other are the same as embodiment 1, the composite material finally obtained is recorded as ZCS / GNS / CNF -2, the composite material finally obtained is denoted as ZCS / GNS / CNF-3. Implementation results: Cobalt-zinc sulfide nanoparticles grow uniformly on graphene / carbon nanofibers; compared with ZCS / GNS / CNF-1, the sheets of cobalt-zinc sulfide nanoparticles in ZCS / GNS / CNF-3 are larger , the content is also more.

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Abstract

The invention belongs to the technical field of transition metal sulfide / carbon materials, and particularly discloses a cobalt zinc sulfide / graphene / carbon nanofiber composite material and a preparing method thereof. The preparing method includes the steps that a polyacrylonitrile nanofiber film is prepared through electrostatic spinning, polyacrylonitrile nanofibers are wrapped by graphene oxide with a solution soaking method, then a graphene / carbon nanofiber composite film is prepared through high temperature carbonization, and cobalt zinc sulfide nanometer particles grow on the graphene / carbon nanofibers with a one-step hydrothermal method in an in-situ mode. The prepared cobalt zinc sulfide / graphene / carbon nanofiber composite material is controllable in morphology, has the high specific surface area and the good electrical conductivity, and can serve as an ideal high-performance electro-catalysis material and an electrode material of new energy devices such as a lithium-ion battery and a solar cell.

Description

technical field [0001] The invention belongs to the technical field of transition metal selenide-carbon materials, and in particular relates to a cobalt-zinc sulfide / graphene / carbon nanofiber composite material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional material composed of carbon atoms with a thickness of only one atom. It has excellent physical and chemical properties, such as excellent mechanical properties, high electrical conductivity, and good thermal conductivity. It is considered to be the most One of the potential nanomaterials. As a one-dimensional carbon nanomaterial, carbon nanofiber has the advantages of good mechanical properties, large specific surface area and good chemical stability. These special properties make it 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 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M11/53D04H1/728D04H1/43D06C7/04D01D5/00H01M4/58H01M4/62H01M10/0525H01L31/0224B01J27/043B01J35/06D06M101/40
CPCY02E60/10
Inventor 刘天西张龙生樊玮缪月娥张由芳顾华昊
Owner FUDAN UNIV
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