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Preparation method and application of amorphous CoMoS4/NiSe nanosheet array composite material

A nanosheet array and composite material technology, which is applied in the field of preparation of amorphous cobalt tetrathiomolybdate/nickel selenide nanosheet array composite materials, can solve the problem of difficulty in forming high energy density supercapacitors and reducing the energy storage capacity of supercapacitors , It is difficult to obtain high specific capacitance and other problems, to achieve the effect of promoting contact, low cost, and simple preparation method

Active Publication Date: 2019-08-16
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vast majority of pseudocapacitive materials are crystalline materials, but due to their anisotropic characteristics, crystalline materials are not conducive to the rapid diffusion of ions, and it is difficult to obtain high specific capacitance, so it is difficult to form a supercapacitor with high energy density.
In addition, when preparing supercapacitor electrodes, it is often necessary to add a binder to bind the electrode material and the current collector; however, the binder will block the pores of the electrode material to a certain extent, which will inevitably reduce the energy storage capacity of the supercapacitor.

Method used

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  • Preparation method and application of amorphous CoMoS4/NiSe nanosheet array composite material
  • Preparation method and application of amorphous CoMoS4/NiSe nanosheet array composite material
  • Preparation method and application of amorphous CoMoS4/NiSe nanosheet array composite material

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Embodiment 1

[0032] 1. Preparation of composite materials

[0033] An amorphous CoMoS 4 The preparation method of / NiSe nano sheet array composite material, comprises the following steps:

[0034] Step 1. Add 5 mmol of cobalt nitrate hexahydrate, 2.5 mmol of sodium molybdate heptahydrate and 50 mL of deionized water into a 100 mL autoclave at room temperature, stir and dissolve to obtain a mixed aqueous solution A;

[0035] Step 2, immerse the cleaned foamed nickel in the mixed aqueous solution A, seal and heat the autoclave to 80°C for hydrothermal reaction, keep the temperature for 10 hours, and cool to room temperature to obtain the reaction product A;

[0036] Step 3. Wash the reaction product A several times with deionized water and ethanol in sequence, and dry it in vacuum at 60°C for 12 hours to obtain CoMoO grown on nickel foam 4 nanosheet arrays;

[0037] Step 4, at room temperature, add 2mmol sodium sulfide and 50mL deionized water into a 100mL autoclave, stir and dissolve to o...

Embodiment 2

[0053] An amorphous CoMoS 4 The preparation method of / NiSe nano sheet array composite material, comprises the following steps:

[0054] Step 1. At room temperature, add 5 mmol cobalt nitrate hexahydrate, 10 mmol sodium molybdate heptahydrate and 75 mL deionized water into a 100 mL autoclave, stir and dissolve to obtain a mixed aqueous solution A;

[0055] Step 2, immerse the cleaned foamed nickel in the mixed aqueous solution A, seal and heat the autoclave to 180°C for hydrothermal reaction, keep the temperature for 4 hours, and cool to room temperature to obtain the reaction product A;

[0056] Step 3. Wash the reaction product A several times with deionized water and ethanol in sequence, and dry it in vacuum at 60°C for 12 hours to obtain CoMoO grown on nickel foam 4 nanosheet arrays;

[0057] Step 4, at room temperature, add 2mmol sodium sulfide and 70mL deionized water into a 100mL autoclave, stir and dissolve to obtain a sodium sulfide solution;

[0058] Step 5, growin...

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Abstract

The invention discloses a preparation method of an amorphous CoMoS4 / NiSe nanosheet array composite material, which comprises the following steps: (1) under hydrothermal conditions, cobalt nitrate hexahydrate reacts with sodium molybdate heptahydrate, and a CoMoO4 nanosheet array is grown on foam nickel; (2) sodium sulfide and the CoMoO4 nanosheet array react hydrothermally to form an amorphous CoMoS4 nanosheet array; and (3) under hydrothermal conditions, nickel chloride hexahydrate, selenium dioxide and urea react to form amorphous NiSe, and the amorphous NiSe is deposited on the surface of the amorphous CoMoS4 nanosheet array to obtain an amorphous CoMoS4 / NiSe nanosheet array composite material finally. The preparation method is simple and low in cost, and the prepared amorphous CoMoS4 / NiSe nanosheet array composite material has high specific capacitance and good cyclic stability, can be applied to super capacitor electrode materials and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a method for preparing an amorphous cobalt tetrathiomolybdate / nickel selenide nanosheet array composite material and the application of the composite material as an electrode material for supercapacitors. Background technique [0002] A supercapacitor consists of electrodes, electrolytes, current collectors and separators, and is a new type of electrochemical energy storage device. It has a lower energy density than lithium-ion batteries. However, it has its own advantages, such as high power density, fast charge and discharge speed, and long cycle life, so it has become one of the current research hotspots. [0003] Supercapacitors are divided into pseudocapacitors and electric double layer capacitors. Pseudocapacitors store energy by faradaic redox reactions on the surface of electrode materials, while electric double layer capacitors store energy by adsorbing charges...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 范乐庆顾芸吴季怀
Owner HUAQIAO UNIVERSITY
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