Carbon nano tube-cobalt tetrasulfide and nickel composite material, preparation method and application thereof

A technology of dicobalt tetrasulfide and carbon nanotubes, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the conductivity cannot meet the high current density of supercapacitors, and the rate performance Inadequate, large capacity loss and other problems, to achieve good cycle stability, improve rate performance, weaken the effect of agglomeration

Active Publication Date: 2019-05-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its conductivity still cannot meet the high current density requirements of supercapacitors, and the capacity loss is large under high power, and the rate performance is not good.

Method used

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  • Carbon nano tube-cobalt tetrasulfide and nickel composite material, preparation method and application thereof
  • Carbon nano tube-cobalt tetrasulfide and nickel composite material, preparation method and application thereof
  • Carbon nano tube-cobalt tetrasulfide and nickel composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033](1) Dissolve 0.16g of cetyltrimethylammonium bromide in a mixed solution of 30ml of deionized water and 120ml of ethanol, add 1.5ml of ammonia water and 0.1g of hydroxylated carbon nanotube powder, and mix in a beaker , Ultrasonic dispersion for 40min. Then 1ml of n-methylsilane (TEOS) was added dropwise, and magnetically stirred for 6h at a speed of 60r / min. Then the product was filtered and washed, and dried at 60°C for 12 hours to obtain CNT@SiO 2 .

[0034] (2) Take 30 mg of the powder material prepared in the previous step, put it into a glass bottle with a blue cap, add 40 ml of deionized water, and disperse it by ultrasonic for 40 min. Then add 1g of urea and 1ml of 0.1mol / L Ni(NO 3 ) 2 and 2ml of 0.1mol / L Co(NO 3 ) 2 The solution was magnetically stirred for 5 minutes, the bottle was tightly sealed, and the reaction was carried out by hydrothermal reaction at 105°C for 12 hours. Then cool naturally, wash the obtained product by suction filtration, and dry ...

Embodiment 2

[0042] (1) Dissolve 0.2g cetyltrimethylammonium bromide in a mixed solution of 30ml deionized water and 120ml ethanol, add 1.5ml ammonia water and 0.1g hydroxylated carbon nanotube powder, and mix in a beaker , Ultrasonic dispersion for 40min. Then 1ml of n-methylsilane (TEOS) was added dropwise, and magnetically stirred for 6h at a speed of 60r / min. Then the product was filtered and washed, and dried at 60°C for 12 hours.

[0043] (2) Take 30 mg of the powder material prepared in the previous step, put it into a glass bottle with a blue cap, add 40 ml of deionized water, and disperse it by ultrasonic for 40 min. Then add 2g ammonia water and 1ml 0.1mol / L Ni(NO 3 ) 2 and 2ml of 0.1mol / L Co(NO 3 ) 2 The solution was magnetically stirred for 5 minutes, the bottle was tightly sealed, and the reaction was carried out by hydrothermal reaction at 105°C for 12 hours. Then cool naturally, filter and wash the obtained product, and dry at 60°C for 12h.

[0044] (3) Take 10 mg of ...

Embodiment 3

[0046] (1) Dissolve 0.16g of octadecyltrimethylammonium bromide in a mixed solution of 30ml of deionized water and 120ml of ethanol, add 1.5ml of ammonia water and 0.1g of hydroxylated carbon nanotube powder, and mix in a beaker , Ultrasonic dispersion for 40min. Then 1ml of n-methylsilane (TEOS) was added dropwise, and magnetically stirred for 6h at a speed of 60r / min. Then the product was filtered and washed, and dried at 60°C for 12 hours.

[0047] (2) Take 30 mg of the powder material prepared in the previous step, put it into a glass bottle with a blue cap, add 40 ml of deionized water, and disperse it by ultrasonic for 40 min. Then add 1g of urea and 1ml of 0.1mol / L Ni(NO 3 ) 2 and 2ml of 0.1mol / L Co(NO 3 ) 2 The solution was magnetically stirred for 5 minutes, the bottle was tightly sealed, and the reaction was carried out by hydrothermal reaction at 105°C for 12 hours. Then cool naturally, filter and wash the obtained product, and dry at 60°C for 12h.

[0048] (...

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Abstract

The invention discloses a carbon nano tube-cobalt tetrasulfide and nickel composite material, a preparation method and an application thereof. The preparation method comprises the following steps: (1)ultrasonically dispersing a carbon nano tube, ammonia water, ethyl orthosilicate and a surfactant into a mixed solution of ethanol and water, stirring and reacting, and carrying out suction filtration and drying to obtain powder; (2) dispersing the powder in the last step with nickel nitrate, cobalt nitrate and an accelerant of an alkaline environment into deionized water, carrying out hydrothermal reaction, and then carrying out suction filtration on the cooled product, cleaning and drying; and (3) dispersing the powder obtained in the last step in an aqueous solution of sodium sulfide, carrying out a hydrothermal reaction to finally obtain the carbon nano tube-cobalt tetrasulfide and nickel composite material. The composite material, the preparation method and the application in the invention have the beneficial effects that the capacity and the cycling stability of the material are improved.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a carbon nanotube-cobalt tetrasulfide nickel alloy composite material and a preparation method and application thereof. Background technique [0002] Nickel dicobalt sulfide has the characteristics of high supercapacitor pseudocapacitance, abundant element sources, and higher conductivity than nickel sulfide and cobalt sulfide. It is a class of supercapacitor materials with great potential. However, its conductivity still cannot meet the high current density requirements of supercapacitors, and the capacity loss is large under high power, and the rate performance is not good. Carbon nanotubes have good crystallinity, excellent mechanical and electrical properties and high specific surface area, and can provide ideal conductive networks for other materials. By combining the active material with carbon nanotubes to form a carbon nanotube network to provide electronic ch...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 侯峰蒋小通
Owner TIANJIN UNIV
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