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Nickel selenide/hollow carbon-fibre composite and preparation method thereof

A composite material, carbon fiber technology, applied in chemical instruments and methods, chemical/physical processes, nanotechnology for materials and surface science, etc. The effect of ingenious experimental design, effective and quick preparation method

Inactive Publication Date: 2016-12-21
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon fiber is usually prepared by calcining cellulose at high temperature in an inert atmosphere. At present, bacterial cellulose and artificial synthetic fiber are used as precursors, but its complicated preparation process limits its production and application.

Method used

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  • Nickel selenide/hollow carbon-fibre composite and preparation method thereof
  • Nickel selenide/hollow carbon-fibre composite and preparation method thereof
  • Nickel selenide/hollow carbon-fibre composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, the present embodiment comprises the following steps:

[0030] (1) Place the cotton in high-purity nitrogen gas for high-temperature carbonization. The high-temperature carbonization temperature is 900°C, and the high-temperature carbonization time is 2 hours to prepare hollow carbon fibers;

[0031] (2) Dissolve 1 mmol of nickel nitrate hexahydrate and 3 mmol of urea in a mixture of 30 mL of ethanol and water (volume ratio 2:1), and stir for a period of time to disperse them evenly;

[0032] (3) After immersing 5 mg of hollow carbon fibers into the mixture prepared in (4), heat them in a water bath to 80 °C and react for 7 h. After cooling down naturally, take out the carbon fibers and wash them repeatedly with deionized water and ethanol and dry them to obtain Nickel hydroxide / hollow carbon fiber composite material, denoted as Ni(OH) 2 -HCF;

[0033] (4) Place the prepared nickel hydroxide / hollow carbon fiber composite material in the lower tuyere of t...

Embodiment 2

[0034] Example 2, change the selenization temperature in Example 1 to 400°C, the rest are the same as in Example 1, and the finally obtained composite material is denoted as NiSe 2 -HCF-2.

Embodiment 3

[0035] Example 3, change the selenization temperature in Example 1 to 450°C, the rest are the same as in Example 1, and the finally obtained composite material is denoted as NiSe 2 -HCF-3.

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Abstract

The invention belongs to the technical field of transition-metal chalcogenide-carbon material and specifically relates to a nickel selenide / hollow carbon-fibre composite and a preparation method thereof. The preparation process comprises the following steps: preparing hollow carbon fiber by the use of high-temperature carbonized cotton, then growing vertical nickel hydroxide nanosheet in situ on the hollow carbon fiber by a chemical bath deposition method, and finally selenizing the obtained nickel hydroxide / hollow carbon fiber composite so as to prepare the nickel selenide / hollow carbon-fibre composite. The prepared carbon fiber is a hollow structure and has large specific surface area and good conductivity. The preparation process is simple, and cost is low. The morphology of the finally prepared nickel selenide / hollow carbon-fibre composite is controllable. Nickel selenide uniformly grows on the internal and external tube walls of the hollow carbon nanofiber. By full utilization of the unique hollow tube structure and high specific surface area of the hollow carbon fiber, the product can be used as an ideal high-performance electrocatalysis material as well as an electrode material of new energy devices such as a sodium-ion battery and a supercapacitor, etc.

Description

technical field [0001] The invention belongs to the technical field of transition metal chalcogenide-carbon materials, and in particular relates to a nickel selenide / hollow carbon fiber composite material and a preparation method thereof. Background technique [0002] Nickel selenide is a typical transition metal chalcogenide, and it has high conductivity (resistivity < 10 -2 Ωcm), therefore, nickel selenide is widely used in electrochemical hydrogen evolution, dye-sensitized solar cells and other fields, but pure nickel selenide is easy to agglomerate, so that its electrochemical active sites cannot be fully exposed, which seriously affects the Its catalytic properties and energy storage performance. It is of great significance to effectively combine nickel selenide with a substrate material with excellent stability. Carbon fiber, due to its high electrical conductivity and chemical stability, can be used as a substrate material with excellent performance to load activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01G11/36H01G11/30H01G11/26B01J27/057B82Y40/00B82Y30/00
CPCB01J27/0573B82Y30/00B82Y40/00H01G11/26H01G11/30H01G11/36H01M4/362H01M4/581H01M4/583H01M4/625Y02E60/10Y02E60/13
Inventor 刘天西郜伟施贻琴樊玮
Owner FUDAN UNIV
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