Method for preparing Ni3Se4 nanowire for supercapacitor

A technology of supercapacitors and nanowires, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of less application of supercapacitors, and achieve the effects of controllable morphology, mild conditions and easy operation.

Active Publication Date: 2020-02-18
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for preparing Ni3Se4 nanowire for supercapacitor
  • Method for preparing Ni3Se4 nanowire for supercapacitor
  • Method for preparing Ni3Se4 nanowire for supercapacitor

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 hours. 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 method for preparing a Ni3Se4 nanowire for a supercapacitor, and belongs to the field of energy storage material preparation. The method comprises the following steps: firstly, preparing a nickel hydroxide nanowire precursor under the template-free and surfactant-free condition; then, using a nickel hydroxide nanowire as a self-template to carry out a selenization reaction to obtain a Ni3Se4 nanowire. The preparation method of the invention is simple and easy to implement, does not require complicated equipment, and has low cost. The prepared Ni3Se4 nanowire is uniformly distributed. In an alkaline electrolyte, the Ni3Se4 nanowire has a large specific capacity and good rate performance, and is a promising supercapacitor electrode material.

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 Applications(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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