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Ni for a supercapacitor 3 the se 4 Preparation method of nanowire

A technology of supercapacitors and nanowires, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors. It can solve the problems of few applications of supercapacitors and achieve the effects of controllable shape, mild conditions and easy operation.

Active Publication Date: 2021-11-02
JIANGSU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metal selenides have been widely used in catalysis, photolysis of water, and fuel-sensitized solar cells, but relatively few applications in supercapacitors

Method used

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  • Ni for a supercapacitor <sub>3</sub> the se <sub>4</sub> Preparation method of nanowire
  • Ni for a supercapacitor <sub>3</sub> the se <sub>4</sub> Preparation method of nanowire
  • Ni for a supercapacitor <sub>3</sub> the se <sub>4</sub> Preparation method of nanowire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ni for a supercapacitor 3 Se 4 Preparation of nanowires:

[0032] (1) Weigh 2.576 g of nickel sulfate hexahydrate and dissolve it in 40.0 mL of distilled water, then add 0.196 g of sodium hydroxide and stir for 30 min to obtain a reaction mixture;

[0033] (2) Transfer the reaction mixture obtained in step 1 into a polytetrafluoroethylene liner and seal it in a stainless steel reactor for solvothermal reaction. The reaction temperature is 120°C and the reaction time is 24 h. After the reaction is completed, naturally cool to room temperature. Centrifuge, wash the precipitate with water and ethanol in turn, and dry the precipitate in vacuum at 60°C to obtain nickel hydroxide nanowire powder;

[0034] (3) Under ultrasonic conditions, 200 mg of nickel hydroxide nanowires were dispersed in 25.0 mL of ethanol, and the resulting dispersion was designated as liquid A;

[0035] (4) Weigh 0.34 g of selenium powder and 0.34 g of sodium borohydride, add 5.0 mL of water, and sti...

Embodiment 2

[0037] The difference between Example 2 and Example 1 lies in that the temperature of the hydrothermal reaction in step 4 is 120° C., and the reaction time is 6 h. All the other reaction processes are the same.

Embodiment 3

[0039] The difference between Example 3 and Example 1 is that in Step 4, the precipitate was dried in a vacuum oven at 50° C. for 12 h. All the other reaction processes are the same.

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Abstract

The invention discloses a kind of Ni for supercapacitor 3 Se 4 The invention relates to a method for preparing nanowires, which belongs to the field of energy storage material preparation. The preparation process is as follows: firstly, the precursor of nickel hydroxide nanowires is prepared under the condition of no template and surfactant; 3 Se 4 Nanowires. The preparation method of the present invention is simple and easy, does not need complex equipment, and has low cost; the prepared Ni 3 Se 4 The nanowires are evenly distributed. In alkaline electrolytes, Ni 3 Se 4 Nanowires have large specific capacity and good rate performance, and are promising electrode materials for supercapacitors.

Description

technical field [0001] The invention relates to the field of preparation of energy storage materials, in particular to a Ni 3 Se 4 Methods of preparing nanowires. Background technique [0002] In recent years, with the continuous aggravation of environmental pollution and the rapid consumption of fossil energy, clean energy has been paid more and more attention. The efficient application of clean energy requires not only energy generation devices, but also the role of energy storage devices. Advanced storage More and more scientific researchers pay more and more attention to energy-efficient devices. Among various energy storage and conversion devices, supercapacitors have become a promising energy storage device due to their advantages of high power density, fast charge and discharge rate and long life. Most of the existing supercapacitors use activated carbon as the electrode material. This material has the characteristics of long cycle stability, but the energy density...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 李中春田美姣王迪顾爱军周志豪
Owner JIANGSU UNIV OF TECH
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