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Three-dimensional porous selenide nanocomposite used for super capacitor and preparation method thereof

A technology of nanocomposite materials and supercapacitors, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of less research and application of supercapacitors, and achieve excellent cycle stability, excellent rate performance, and increased ratio The effect of surface area

Inactive Publication Date: 2016-10-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metal selenides have been applied in catalysis, photolysis of water, and fuel-sensitized solar cells, but there are very few researches and applications in supercapacitors.

Method used

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  • Three-dimensional porous selenide nanocomposite used for super capacitor and preparation method thereof
  • Three-dimensional porous selenide nanocomposite used for super capacitor and preparation method thereof
  • Three-dimensional porous selenide nanocomposite used for super capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Put nickel foam with a size of 2cm×4 cm into 3 mol L -1 In the hydrochloric acid solution, ultrasonically react for 30 minutes to remove the NiO layer on the surface, and wash the treated nickel foam with deionized water and ethanol until neutral.

[0035] (2) Weigh 1mmol of nickel nitrate hexahydrate, 1mmol of cobalt nitrate hexahydrate and 10mmol of urea in a mixed solution of deionized water and ethanol, in which 15mL of deionized water and ethanol are stirred for 30min; After reacting at 100°C for 8 hours in a vinyl fluoride hydrothermal reactor, cool to room temperature, rinse with ethanol and deionized water, and dry to obtain a precursor.

[0036] (3) Weigh 1mmol of selenium powder as the raw material and add it to the mixed solution of hydrazine hydrate and ethylene glycol (5mL hydrazine hydrate and 15mL ethylene glycol), mix well by ultrasonic, then add 150mg of the precursor obtained in step (2), Stir and transfer to reaction kettle.

[0037] (4) Put the...

Embodiment 2

[0039] (1) Put nickel foam with a size of 2cm×4 cm into 3 mol L -1 In the hydrochloric acid solution, ultrasonically react for 30 minutes to remove the NiO layer on the surface, and wash the treated nickel foam with deionized water and ethanol until neutral.

[0040] (2) Weigh 1mmol of nickel nitrate hexahydrate, 1mmol of cobalt nitrate hexahydrate and 10mmol of urea in a mixed solution of deionized water and ethanol, in which 15mL of deionized water and ethanol are stirred for 30min; After reacting at 100°C for 8 hours in a vinyl fluoride hydrothermal reactor, cool to room temperature, rinse with ethanol and deionized water, and dry to obtain a precursor.

[0041] (3) Weigh 1mmol of selenium powder as the raw material and add it to the mixed solution of hydrazine hydrate and ethylene glycol (5mL hydrazine hydrate and 15mL ethylene glycol), mix well by ultrasonic, then add 100mg of the precursor obtained in step (2), Stir and transfer to reaction kettle.

[0042] (4) Put the...

Embodiment 3

[0044] (1) Put nickel foam with a size of 2cm×4 cm into 3 mol L -1 In the hydrochloric acid solution, ultrasonically react for 30 minutes to remove the NiO layer on the surface, and wash the treated nickel foam with deionized water and ethanol until neutral.

[0045] (2) Weigh 1mmol of nickel nitrate hexahydrate, 1mmol of cobalt nitrate hexahydrate and 10mmol of urea in a mixed solution of deionized water and ethanol, in which 15mL of deionized water and ethanol are stirred for 30min; After reacting at 100°C for 8 hours in a vinyl fluoride hydrothermal reactor, cool to room temperature, rinse with ethanol and deionized water, and dry to obtain a precursor. .

[0046] (3) Weigh 1mmol of selenium powder as the raw material and add it to the mixed solution of hydrazine hydrate and ethylene glycol (5mL hydrazine hydrate and 15mL ethylene glycol), mix well by ultrasonic, then add 50mg of the precursor obtained in step (2), Stir and transfer to reaction kettle.

[0047] (4) Put t...

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Abstract

The invention discloses a three-dimensional porous Ni0.85Se / Co9Se8 nanocomposite which takes foamed nickel as a substrate and is used for a super capacitor and a preparation method thereof. The preparation method comprises the following steps of carrying out preprocessing on porous foamed nickel and taking the foamed nickel as a current collector of an electrode; using a two-step hydrothermal method, firstly synthesizing a Ni-Co precursor, and then carrying out selenylation on the precursor so as to acquire the Ni0.85Se / Co9Se8 nanocomposite. The Ni0.85Se / Co9Se8 nanocomposite is formed through uniformly compositing two materials of Ni0.85Se and Co9Se8 so as to form an interconnected three-dimensional porous nanostructure. Under a three-electrode test system, the material possesses a high specific capacitance and simultaneously possesses good electrochemistry stability, and is an excellent super capacitor electrode material.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a selenide composite electrode material for supercapacitors and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the continuous consumption of fossil energy and the aggravation of environmental pollution, a series of worldwide problems of sustainable economic and social development in the future have attracted more and more attention from all countries in the world. In this context, people are actively looking for and developing various new clean energy sources, such as solar energy, wind energy, tidal energy, nuclear energy, biological energy, and so on. In the field of energy, it has become more and more important to develop a high-efficiency, low-cost, long-life, and environmentally friendly energy conversion and storage system. Among them, supercapacitor is a new type of energy storage device, its ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/86
Inventor 吕建国杨杰
Owner ZHEJIANG UNIV
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