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A kind of nise three-dimensional porous nano-sheet material and preparation method thereof for supercapacitor

A supercapacitor, three-dimensional porous technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, binary selenium/tellurium compounds, etc. The effect of migration, increasing specific surface area, and increasing specific capacitance

Active Publication Date: 2018-09-11
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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  • A kind of nise three-dimensional porous nano-sheet material and preparation method thereof for supercapacitor
  • A kind of nise three-dimensional porous nano-sheet material and preparation method thereof for supercapacitor
  • A kind of nise three-dimensional porous nano-sheet material and preparation method thereof for supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Cut the nickel foam into a size of 4cm×2cm, and put it in a 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.

[0034] (2) Weigh 1mmol of nickel chloride hexahydrate and 1mmol of sodium selenite and dissolve them in 36mL of deionized water, then add 4mL of hydrazine hydrate and stir for 30min to obtain a precursor solution.

[0035](3) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, place the nickel foam treated in step (1) in it, put the reaction kettle into a drying oven, and react at 140°C for 24h, then Cool the reactor to room temperature, collect the nickel foam, rinse with ethanol and deionized water, and dry, and the final sample obtained is a NiSe three-dimensional porous nanosheet material.

Embodiment 2

[0037] (1) Cut the nickel foam into a size of 4cm×2cm, and put it in a 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.

[0038] (2) Weigh 1mmol of nickel chloride hexahydrate and 1mmol of sodium selenite and dissolve them in 36mL of deionized water, then add 6mL of hydrazine hydrate and stir for 30min to obtain a precursor solution.

[0039] (3) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, place the nickel foam treated in step (1) in it, put the reaction kettle into a drying oven, and react at 140°C for 12h, then Cool the reactor to room temperature, collect the nickel foam, rinse with ethanol and deionized water, and dry, and the final sample obtained is a NiSe three-dimensional porous nanosheet material.

Embodiment 3

[0041] (1) Cut the nickel foam into a size of 4cm×2cm, and put it in a 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.

[0042] (2) Weigh 1mmol of nickel chloride hexahydrate and 1mmol of sodium selenite as raw materials and dissolve them in 36mL of deionized water, then add 8mL of hydrazine hydrate and stir for 30min to obtain a precursor solution.

[0043] (3) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, place the nickel foam treated in step (1) in it, put the reaction kettle into a drying oven, and react at 140°C for 8 hours, then Cool the reactor to room temperature, collect the nickel foam, rinse with ethanol and deionized water, and dry, and the final sample obtained is a NiSe three-dimensional porous nanosheet material.

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Abstract

The invention discloses a NiSe three-dimensional porous nanosheet material used for a superconductor and a preparation method thereof. NiSe nanosheets are stacked and intersect in the longitudinal and horizontal directions to form a three-dimensional pore-shaped structure in mutual communication, the thickness of the nanosheets does not exceed 10 nm, and big pores of 10-300 nm and small pores of 10-100 nm are evenly distributed in an intersected mode; the specific capacitance value of the NiSe three-dimensional porous nanosheet material under 1Ag-1 current density is 1565 F g-1; the NiSe three-dimensional porous nanosheet material is synthesized by the adoption of a one-step hydrothermal method, with foamed nickel being a substrate, nickel chloride hexahydrate, sodium selenite, hydrazine hydrate and deionized water are mixed to obtain a precursor solution, the precursor solution is put into a reaction kettle for a reaction for 8-24 h at the temperature of 140-180 DEG C, and then the product is obtained. The preparation method is simple and easy to implement, and the obtained NiSe three-dimensional porous nanosheet material has excellent electrochemical performance and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a selenide 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 performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04H01G11/30H01G11/24H01G11/26H01G11/86
CPCY02E60/13
Inventor 吕建国杨杰
Owner ZHEJIANG UNIV
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