Cobalt disulfide/carbon nanofiber composite material and preparation method thereof

A technology of carbon nanofibers and cobalt disulfide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of affecting catalytic characteristics and energy storage cycle stability, and the active sites cannot be fully obtained. Exposure and other issues, to achieve the effect of convenient and effective preparation method, ingenious experimental design, and easy operation

Inactive Publication Date: 2016-05-25
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure cobalt disulfide is easy to agglomerate, so that the active sites cannot be fully

Method used

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  • Cobalt disulfide/carbon nanofiber composite material and preparation method thereof
  • Cobalt disulfide/carbon nanofiber composite material and preparation method thereof
  • Cobalt disulfide/carbon nanofiber composite material and preparation 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 10mL 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 preoxidation time is 1h, and the preoxidized polyacrylonitrile nanofiber membrane is prepared;

[0037] (4) Carry out high-temperature carbonization of the obtained polyacrylonitrile nanofiber membrane in high-purity nitrogen, the high-temperature carbonization temperature is 800 ° C, and the high-temperature carb...

Embodiment 2

[0041] Embodiment 2,Change the quality of cobaltous chloride in Example 1 to 238mg, the quality of thiourea to 380mg, and the reaction temperature to 180°C. The rest are the same as in Example 1, and the finally obtained composite material is recorded as CNFCoS 2 -3.

Embodiment 3

[0042] Embodiment 3, The time of carbon nanofiber film acidification treatment in embodiment 1 is changed into 6h, the quality of cobaltous chloride is changed into 714mg, the quality of thiourea is changed into 1140mg, all the other are the same as embodiment 1, the composite material finally obtained records for CNFCoS 2 -9.

[0043] In the electrochemical test, a three-electrode test system was adopted, the glassy carbon electrode modified by the prepared hybrid material was used as the working electrode, the saturated calomel electrode was used as the reference electrode, the graphite rod was used as the counter electrode, and the electrolyte was 0.5MH 2 SO 4 . Before the test, the electrolyte was pre-filled with nitrogen for 30 min. The electrocatalytic hydrogen evolution reaction activity of the hybrid material prepared in the present invention was studied by linear sweep voltammetry.

[0044] The SEM figure of the cobalt disulfide / carbon nanofiber composite materi...

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Abstract

The invention belongs to the technical field of transition metal sulfide-carbon materials and particularly relates to a cobalt disulfide/carbon nanofiber composite material and a preparation method and application thereof. The preparation process of the composite material includes the steps that carbon nanofibers are prepared through electrostatic spinning and a high-temperature carbonization method, and cobalt disulfide particles grow on the carbon nanofibers in situ through a solvent thermal method. The carbon nanofibers prepared through the method have large specific surface area, excellent conductivity, stable chemical performance and good mechanical performance. With the carbon nanofibers serve as substrate substances, the prepared cobalt disulfide/carbon nanofiber composite material has the advantage that the shape and the appearance are controllable, the cobalt disulfide particles evenly grow on the surfaces of the carbon nanofibers, and the synergistic effect of the cobalt disulfide particles and the carbon nanofibers can be given full play to. The prepared cobalt disulfide/carbon nanofiber composite material can serve as high-performance electric catalysis materials and electrode materials of lithium ion batteries, solar cells and other new-energy devices.

Description

technical field [0001] The invention belongs to the technical field of transition metal sulfide-carbon materials, and in particular relates to a cobalt disulfide / carbon nanofiber composite material and a preparation method thereof. Background technique [0002] Carbon nanofibers are widely used in the field of electrochemistry due to their excellent electrical conductivity, extremely high surface area and structural stability. In energy storage devices such as lithium-ion batteries and supercapacitors, carbon nanofibers play many roles, such as serving as active electrode materials and providing substrates for active metals (oxides). Electrospinning technology provides a low-cost and large-scale production method of carbon nanofibers, and its fiber structure can be adjusted. Polymer precursors, processing parameters and added blends will all affect the morphology, structure and function of carbon nanofibers. [0003] Pyrite-phase transition metal sulfides (MX 2 , M=Fe, Co...

Claims

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Application Information

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IPC IPC(8): B82Y30/00H01G11/30H01G11/36H01M4/36H01M4/58H01M4/62
CPCB82Y30/00H01G11/30H01G11/36H01M4/362H01M4/5815H01M4/625Y02E60/10
Inventor 刘天西顾华昊黄云鹏左立增樊玮鄢家杰
Owner FUDAN UNIV
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