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A kind of preparation method and application of cobalt sulfide/cobalt basic salt nanocomposite

A nanocomposite material and basic salt technology, which is applied in the field of preparation of cobalt sulfide/cobalt basic salt nanocomposite materials, can solve problems such as unsatisfactory specific capacitance, and achieve excellent electrochemical performance, high specific surface area, and simple operation. Effect

Active Publication Date: 2018-10-16
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metal oxides (such as RuO x , MnO 2 ), metal hydroxides, conductive polymers (such as polyaniline, polythiophene) and metal sulfides (such as Co 8 S 9 , NiS) is a pseudocapacitive electrode material. At present, the energy density of supercapacitors still cannot meet the requirements of practical applications, so a lot of efforts are still needed to improve the capacitive performance of supercapacitor electrode materials.
[0004] The specific capacitance of single-structure nanomaterials, such as nanosheets, nanorods, nanotubes, etc., as electrode materials for supercapacitors is often not ideal.

Method used

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  • A kind of preparation method and application of cobalt sulfide/cobalt basic salt nanocomposite
  • A kind of preparation method and application of cobalt sulfide/cobalt basic salt nanocomposite
  • A kind of preparation method and application of cobalt sulfide/cobalt basic salt nanocomposite

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Embodiment 1

[0032] A preparation method of cobalt sulfide / cobalt basic salt nanocomposite material, comprising the following steps:

[0033] A. Add cobalt chloride and urea into 40 milliliters of water respectively, and stir to dissolve them to form a transparent solution. The concentration of cobalt salt in the solution is 0.08 mol / liter, and the concentration of urea is 0.32 mol / liter. In a Teflon-lined stainless steel autoclave, immerse a small piece of clean nickel foam (2 cm x 2 cm) in the mixed solution, and react at 95°C for 8 hours. After cooling, take out the nickel foam, wash it, and dry it. , to prepare the precursor cobalt base salt;

[0034] B, adding 25 milliliters of 0.2 mol / liter sodium sulfide solution into a stainless steel autoclave with a Teflon lining of 50 milliliters, then placing the nickel foam loaded with cobalt basic salt on the Teflon support above the solution , the autoclave was heated at 125°C for 2 hours, then cooled naturally to room temperature, the nick...

Embodiment 2

[0038] A preparation method of cobalt sulfide / cobalt basic salt nanocomposite material, comprising the following steps:

[0039] A. Dissolve cobalt nitrate and urea in 40 milliliters of water respectively. The concentration of cobalt salt in the solution is 0.02 mol / liter, and the concentration of urea is 0.08 mol / liter. The solution is transferred to a stainless steel autoclave with a Teflon lining of 50 milliliters. immerse a small piece of clean nickel foam (2 cm × 2 cm) in the mixed solution, and react for 2 hours at 140 ° C. After cooling, take out the nickel foam, wash it, and dry it to obtain the precursor cobalt basic salt ;

[0040] B. Add 25mL of 0.02 mol / liter sodium sulfide solution into a 50mL Teflon-lined stainless steel autoclave, then place the nickel foam sheet loaded with cobalt basic salt on the Teflon support above the solution, and put the autoclave Heating at 100°C for 10 hours, then naturally cooling to room temperature, taking out the foamed nickel she...

Embodiment 3

[0042] A preparation method of cobalt sulfide / cobalt basic salt nanocomposite material, comprising the following steps:

[0043] A. Dissolve cobalt sulfate and urea in 40 milliliters of water respectively. The concentration of cobalt salt in the solution is 0.1 mol / liter, and the concentration of urea is 0.4 mol / liter. The solution is transferred to a stainless steel autoclave with a Teflon lining of 50 milliliters. immerse a small piece of clean nickel foam (2 cm × 2 cm) in the mixed solution, and react for 4 hours at 120 ° C. After cooling, take out the nickel foam, wash it, and dry it to obtain the precursor cobalt basic salt ;

[0044] B. Add 25mL of 0.1 mol / liter potassium sulfide solution into a 50mL Teflon-lined stainless steel autoclave, then place the nickel foam sheet loaded with cobalt basic salt on the Teflon support above the solution, and put the autoclave Heating at 160°C for 2 hours, then naturally cooling to room temperature, taking out the foamed nickel shee...

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Abstract

The invention discloses a preparation and application of a cobalt sulfide / cobalt salt nano composite material. Firstly, cobalt salt nano lines are prepared through a hydro-thermal method. Then the cobalt salt nano lines are converted to a cobalt sulfide / cobalt salt nano composite material of hierarchical structure through a vapor phase hydro-thermal method. In the hierarchical structure, cobalt sulfide nano sheets are loaded on the surfaces of the cobalt salt nano lines, the thin nano sheets have large specific surface areas, can provide more electrochemical active sites for storage of electrical energy, thereby obtaining high specific capacitance. The nano lines, besides participate in electrochemical energy storage, can also provide support for the nano sheets, prevent aggregation of the nano sheets which affect s the electrochemical performance. Therefore, the cobalt sulfide / cobalt salt nano composite material can be used as a super capacitor electrode material, and has good electrochemical performance.

Description

technical field [0001] The present invention relates to a preparation method and application of a cobalt sulfide / cobalt basic salt nanocomposite material, in particular to a preparation method of a hierarchically structured cobalt sulfide / cobalt basic salt nanocomposite material and its application on supercapacitor electrode materials application. Background technique [0002] Supercapacitors can generally be classified into electric double layer capacitors (EDLCs) and pseudocapacitors. EDLCs store charges through ion adsorption at the electrode / electrolyte interface, while pseudocapacitive capacitors store charges through fast surface redox reactions. The electrode material is the main factor determining the energy storage performance of supercapacitors. [0003] Carbon-based materials such as activated carbon, carbon nanotubes, and graphene are typical EDLC electrode materials. Transition metal oxides (such as RuO x , MnO 2 ), metal hydroxides, conductive polymers (s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/24B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 王正华刘龙
Owner ANHUI NORMAL UNIV