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Nickel cobalt selenide/carbon composite material and preparation method and application thereof

A technology of carbon composite materials and nickel selenide, which is applied in the field of material synthesis and electrochemistry, can solve problems affecting stability and collapse of electrode material structures, and achieve the effects of improved stability, simple and easy preparation method, and high specific capacitance

Active Publication Date: 2021-08-24
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, in the existing reports on transition metal selenides, electrode materials are prone to structural collapse during charge and discharge, which in turn affects their stability.

Method used

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  • Nickel cobalt selenide/carbon composite material and preparation method and application thereof
  • Nickel cobalt selenide/carbon composite material and preparation method and application thereof
  • Nickel cobalt selenide/carbon composite material and preparation method and application thereof

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Embodiment 1

[0055] A kind of preparation method that can be used for the nickel-cobalt selenide / carbon composite material of supercapacitor electrode material, comprises the following steps:

[0056] (1) Weigh 1.455g of cobalt nitrate hexahydrate (molecular weight: 291.03) and 1.642g 2-methylimidazole (molecular weight: 82.1) and dissolve them in 80mL of anhydrous methanol respectively, sonicate until the solution is clear and transparent, then quickly mix the above two solutions , a purple precipitate appeared, ultrasonically dispersed to make it evenly mixed, self-assembled at room temperature for 24 hours, the solid material obtained after centrifugation was washed with absolute ethanol several times, and dried in an oven at 60°C for 12 hours to obtain a metal organic framework ZIF-67.

[0057] (2) Weigh 80 mg of metal-organic framework ZIF-67 powder in step (1) and dissolve it in 15 mL of absolute ethanol, weigh 160 mg of nickel nitrate hexahydrate (molecular weight 218.63) and dissol...

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Abstract

The invention belongs to the technical field of material synthesis and electrochemistry, and discloses a nickel cobalt selenide / carbon composite material and a preparation method and application thereof. The nickel cobalt selenide / carbon composite material is prepared by conducting selenylation treatment on nickel cobalt-layered double hydroxide derived from a metal organic framework ZIF-67 to obtain nickel cobalt selenide, then conducting carbon coating with glucose as a carbon source, and carrying out a constant-current charge-discharge test and a cycling stability test on the nickel cobalt selenide / carbon composite material. The preparation method of the nickel cobalt selenide / carbon composite material is simple and easy to implement, and the composite material has high specific capacitance and good cycling stability when being used for a supercapacitor electrode.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and electrochemistry, and in particular relates to a nickel-cobalt selenide / carbon composite material and a preparation method and application thereof. Background technique [0002] The excessive consumption of fossil energy has exacerbated the environmental and energy crisis. Traditional fossil energy can be replaced by renewable energy such as solar energy and wind energy. For this reason, researchers have worked hard to develop a series of energy storage devices. As a new type of energy storage device, supercapacitors have attracted extensive attention due to their fast charge and discharge capabilities, long cycle life and high rate performance. According to the differences in energy storage principles, supercapacitors can be mainly divided into two categories: one is electric double layer capacitors, which often use carbon materials with large specific surface area as electrode mat...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36H01G11/86
CPCH01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 孔泳王成超吴大同蔡文蓉
Owner CHANGZHOU UNIV
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