Cobalt-nickel sulfide/carbon nanofiber composite material and preparation method and application thereof

A carbon nanofiber, cobalt nickel sulfide technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems affecting catalytic properties and energy storage cycle stability, the inability of active sites to be fully obtained Exposure and other problems, to achieve the effect of ingenious experimental design, good cycle stability, and easy operation

Inactive Publication Date: 2016-01-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pure cobalt-nickel sulfide particles are easy to agglomerate, so that the active sites cannot be fully exposed, which seriously affects its catalytic properties and cycle stability of energy storage.

Method used

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  • Cobalt-nickel sulfide/carbon nanofiber composite material and preparation method and application thereof
  • Cobalt-nickel sulfide/carbon nanofiber composite material and preparation method and application thereof
  • Cobalt-nickel sulfide/carbon nanofiber composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 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 obtained pre-oxidized polyacrylonitrile nanofiber membrane was subjected to high-temperature carbonization in high-purity nitrogen gas, the high-temperature carbonization temperature was 1500° C., and the high-tempera...

Embodiment 2

[0042] The quality of the cobalt nitrate in embodiment 1 becomes 290mg, the quality of nickel nitrate becomes 145mg, the quality of thiourea becomes 300mg, all the other are the same as embodiment 1, the composite material finally obtained is recorded as NiCo 2 S 4 CNF-1.

Embodiment 3

[0044] The quality of the cobalt nitrate in embodiment 1 becomes 1160mg, the quality of nickel nitrate becomes 580mg, the quality of thiourea becomes 1200mg, all the other are the same as embodiment 1, the composite material finally obtained is recorded as NiCo 2 S 4 CNF-2.

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Abstract

The invention belongs to the technical field of transition metal sulfide-carbon materials, and particularly discloses a cobalt-nickel sulfide / carbon nanofiber composite material and a preparation method and an application thereof. The method comprises the following preparation processes: preparing a carbon nanofiber through electrostatic spinning and high-temperature carbonization methods; and carrying out in-situ growth of a cobalt-nickel sulfide nanorod on the carbon nanofiber through a one-step hydrothermal method. The carbon nanofiber prepared by the method has the advantages of stable chemical property, good conductivity, good mechanical property and the like; the final cobalt-nickel sulfide / carbon nanofiber composite material is controllable in morphology; the cobalt-nickel sulfide nanorod uniformly grows on the carbon nanofiber; and a unique base structure and high specific surface area of the carbon nanofiber are fully utilized. The cobalt-nickel sulfide / carbon nanofiber composite material prepared by the method can be used as an ideal high-property electrocatalytic material, and an electrode material for new energy devices of a lithium-ion battery, a super capacitor 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 cobalt-nickel sulfide / carbon nanofiber composite material and its preparation method and application. Background technique [0002] Carbon nanofibers inherit the excellent physical and chemical properties of carbon nanomaterials, 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. Electrospinning is a simple and effective technology for preparing carbon nanofibers. The polymer solution is spun by high-voltage electrostatics, and then pre-oxidized and high-temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M10/0525H01G11/24H01G11/30H01G11/36B82Y30/00
CPCB82Y30/00H01G11/24H01G11/30H01G11/36H01M4/366H01M4/5815H01M4/587H01M10/0525Y02E60/10Y02E60/13
Inventor 刘天西张龙生张由芳樊玮黄云鹏顾华昊
Owner FUDAN UNIV
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