NiCo<2>S<4>@mesocarbon microbead/carbon nanotube composite material and preparation method and application thereof

A technology of mesocarbon microspheres and composite materials, which is applied in the field of NiCo2S4@mesocarbon microspheres/carbon nanotube composites and their preparation, can solve the problems of life cycle limitation, structural instability, short specific capacity, etc. Achieve the effect of improving stability, good cost performance and low cost

Active Publication Date: 2020-04-07
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But pure NiCo 2 S 4 Due to the inherent shortcomings of transition metal sulfides such as unstable structure and low electrical conductivity, its life cycle is limited
The stable structure and excellent conductivity of carbon materials are obvious to all, but its actual specific capacity of less than 200F / g is a fatal shortcoming.

Method used

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  • NiCo&lt;2&gt;S&lt;4&gt;@mesocarbon microbead/carbon nanotube composite material and preparation method and application thereof
  • NiCo&lt;2&gt;S&lt;4&gt;@mesocarbon microbead/carbon nanotube composite material and preparation method and application thereof
  • NiCo&lt;2&gt;S&lt;4&gt;@mesocarbon microbead/carbon nanotube composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Ultrasonic dispersion of 121.92 mg carbon spheres and 30.48 mg carbon nanotubes in distilled water for 30 min, followed by Ni 2 + / Co 2+ / urea molar ratio is 1:2:12, add 1.5mmol Ni(NO 3 ) 2 ·6H 2 O, 3mmol Co(NO 3 ) 2 ·6H 2 0, 18mmol urea, stir to obtain a uniform mixed solution;

[0061] (2) Transfer the mixed solution to a hydrothermal reaction kettle and keep it at 120°C for 8 hours;

[0062] (3) Take out the reactant and wash it with deionized water and ethanol. After vacuum drying at 60° C. for 24 hours, dissolve it in distilled water with 1.755 g of sodium sulfide nonahydrate, and stir for 20 minutes;

[0063] (4) Transfer the mixed solution to a hydrothermal reaction kettle for vulcanization, and keep it at 160° C. for 12 hours;

[0064] (5) The reactant was taken out, washed with deionized water and ethanol, and dried in vacuum at 60° C. for 24 hours to obtain the final product.

Embodiment 2

[0066] (1) Ultrasonic dispersion of 137.16 mg carbon spheres and 15.24 mg carbon nanotubes in distilled water for 30 min, followed by Ni 2 + / Co 2+ / urea molar ratio is 1:2:12, add 1.5mmol Ni(NO 3 ) 2 ·6H 2 O, 3mmol Co(NO 3 ) 2 ·6H 2 0, 18mmol urea, stir to obtain a uniform mixed solution;

[0067] (2) Transfer the mixed solution to a hydrothermal reaction kettle and keep it at 120°C for 8 hours;

[0068] (3) Take out the reactant and wash it with deionized water and ethanol, after vacuum drying at 30°C for 24 hours, dissolve it in distilled water with 1.755g of sodium sulfide nonahydrate, and stir for 20 minutes;

[0069] (4) Transfer the mixed solution to a hydrothermal reaction kettle for vulcanization, and keep it at 160° C. for 12 hours;

[0070] (5) The reactant was taken out, washed with deionized water and ethanol, and dried in vacuum at 30° C. for 24 hours to obtain the final product.

Embodiment 3

[0072] (1) Ultrasonic dispersion of 106.68 mg carbon spheres and 45.72 mg carbon nanotubes in distilled water for 30 min, followed by Ni 2 + / Co 2+ / urea molar ratio is 1:2:12, add 1.5mmol Ni(NO 3 ) 2 ·6H 2 O, 3mmol Co(NO 3 ) 2 ·6H 2 0, 18mmol urea, stir to obtain a uniform mixed solution;

[0073] (2) Transfer the mixed solution to a hydrothermal reaction kettle and keep it at 120°C for 8 hours;

[0074] (3) Take out the reactant and wash it with deionized water and ethanol. After vacuum drying at 60° C. for 24 hours, dissolve it in distilled water with 1.755 g of sodium sulfide nonahydrate, and stir for 20 minutes;

[0075] (4) Transfer the mixed solution to a hydrothermal reaction kettle for vulcanization, and keep it at 160° C. for 12 hours;

[0076] (5) The reactant was taken out, washed with deionized water and ethanol, and dried in vacuum at 60° C. for 24 hours to obtain the final product.

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Abstract

The invention relates to a NiCo2S4@mesocarbon microbead / carbon nanotube composite material and a preparation method and an application thereof. In the composite material, the mesocarbon microbeads account for 17.5%-22.5% of the total mass of the composite material; and the carbon nanotubes account for 2.5%-7.5% of the total mass of the composite material. According to the composite material, NiCo2S4 is compounded with two carbon materials, i.e., mesocarbon microbeads and carbon nanotubes, so the critical shortages that the existing pure-phase NiCo2S4 is unstable in structure, low in conductivity and short in life cycle and the actual specific capacity of a carbon material is less than 200F / g are overcome, and the specific capacity and the cyclic charging and discharging stability of the composite material when the composite material is used for a supercapacitor are remarkably improved.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular, to NiCo 2 S 4 @Mesophase carbon microsphere / carbon nanotube composite material and its preparation method and application. Background technique [0002] Traditional chemical energy storage devices can no longer meet people's demand for high energy storage devices due to their inherent fatal weaknesses such as serious chemical pollution, short service life, and high manufacturing costs. Due to the advantages of environmental friendliness, excellent reversibility, high power density, and long life cycle, supercapacitors are widely used in aerospace, microelectronic devices, electronic communications, and wearable smart devices that require high instantaneous power. occasions, especially in the field of new energy vehicles, has attracted much attention. [0003] The most critical factor determining the performance of a supercapacitor is its electrode material. Accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/36H01G11/24C01B32/05C01B32/168C01G53/00
CPCC01G53/006C01P2002/72C01P2004/03C01P2004/80C01P2006/40C01B32/05C01B32/168H01G11/24H01G11/30H01G11/32H01G11/36Y02E60/13
Inventor 张以河张雨高垲悦孙黎
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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