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Carbon nanotube composite cobalt sulfide nanomaterial and preparation method and application thereof

A carbon nanotube composite and nanomaterial technology, which is applied in the field of carbon nanotube composite cobalt sulfide nanomaterials and its preparation, can solve the problems of cycle performance degradation and achieve the effects of smaller expansion range, improved pore size distribution, and inhibition of expansion

Inactive Publication Date: 2020-02-28
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the disadvantages of the decrease in cycle performance caused by the volume expansion of electrode materials in the prior art, and to provide a carbon nanotube composite cobalt sulfide nanomaterial and its preparation method and application

Method used

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  • Carbon nanotube composite cobalt sulfide nanomaterial and preparation method and application thereof
  • Carbon nanotube composite cobalt sulfide nanomaterial and preparation method and application thereof
  • Carbon nanotube composite cobalt sulfide nanomaterial and preparation method and application thereof

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Embodiment 1

[0031] This embodiment provides a carbon nanotube composite cobalt sulfide nanomaterial, the preparation method of which comprises the following steps:

[0032] (1) 1.0g Co(NO 3 ) 2 ·6H 2 O and 1.0g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 15ml methanol solution respectively to obtain 0.2mol / L Co(NO 3 ) 2 solution and Zn(NO 3 ) 2 solution, in addition, 1.2 g of 2-methylimidazole was fully dissolved in 30 ml of methanol solution to obtain a 0.5 mol / L 2-methylimidazole solution.

[0033] Will Co(NO 3 ) 2 The solution was slowly added dropwise to the 2-methylimidazole solution, and then the mixed solution was slowly added dropwise to the Zn(NO 3 ) 2 In the solution, it was stirred for 30 min and left for 24 h to form a precipitate. Collect the precipitate and disperse it in methanol solution for several times of centrifugation, finally wash with deionized water at least 3 times, and dry at 80-120°C for 12-24 hours to obtain a blue powder, which is the zeolite imidazolate...

Embodiment 2

[0042] The present invention also provides an electrode, which is made of the carbon nanotube composite cobalt sulfide nanomaterial prepared in Example 1 as an active material, and simultaneously includes a conductive agent and a binder, wherein the conductive agent can be selected from acetylene black and the binder Select polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF), and its preparation method is:

[0043] Mix carbon nanotube composite cobalt sulfide nanomaterials, acetylene black conductive agent and polytetrafluoroethylene binder (or polyvinylidene fluoride binder) according to the mass ratio of 7:2:1, add an appropriate amount of ethanol aqueous solution or N -Methylpyrrolidone solvent, ultrasonic vibration or mechanical stirring to form a uniform paste.

[0044] The paste was air-dried at 100°C for 12 hours, then taken out, rolled into a sheet and placed on foamed nickel, and pressed into a sheet to obtain the electrode. Alternatively, the paste was ...

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Abstract

The invention provides a carbon nanotube composite cobalt sulfide nanomaterial and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixinga cobalt salt solution, a zinc salt solution and a 2-methylimidazole solution, carrying out a reaction to obtain a precipitate, and washing and drying the precipitate to obtain a zeolite imidazate skeleton structure material; then roasting the zeolite imidazate skeleton structure material in an inert atmosphere to obtain a carbon nanotube composite metal cobalt nanomaterial; and finally, uniformlymixing the carbon nanotube composite metal cobalt nanomaterial with sulfur, and carrying out a sulfuration reaction in an inert atmosphere to obtain the carbon nanotube composite cobalt sulfide nanomaterial. The material can be used as an active material of an electrode. According to the invention, the zeolite imidazate skeleton structure material is subjected to high-temperature roasting to formcarbon nanotubes in situ, so material expansion is inhibited, an expansion amplitude is reduced, structural stability is improved, and a supercapacitor and a lithium-sulfur battery are allowed to have high capacity retention ratio after hundreds of times of cycles.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a carbon nanotube composite cobalt sulfide nanomaterial and a preparation method and application thereof. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the advantages of long cycle life, fast charging and discharging, and high power density. It is widely used in various fields, such as military industry, electronic products, civil and industrial fields. The main electrode material of supercapacitor is carbon material, which mainly takes advantage of the advantages of high specific surface area and rich pore structure of carbon material. However, carbon materials also have the defect of low wettability, which prevents electrolyte ions from fully entering the micropores, greatly reduces the specific surface utilization of carbon materials, and severely limits the capacity of supercapacitors. [0003] Transiti...

Claims

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Application Information

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IPC IPC(8): C01B32/16C01G51/00H01G11/30H01M4/58H01M4/62H01M10/052B82Y30/00
CPCB82Y30/00C01B2202/22C01G51/30C01P2002/72C01P2004/03C01P2006/40C01B32/16H01G11/30H01M4/5815H01M4/625H01M10/052Y02E60/10Y02E60/13
Inventor 杨伟薛召孙瑞瑞李林林孙辉文雷康州陈胜洲
Owner GUANGZHOU UNIVERSITY
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