3D-nanostructure NiCo2S4 electrode material for super capacitor and preparation method thereof

A supercapacitor, three-dimensional nanotechnology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, chemical instruments and methods, etc., can solve the problems of complex preparation process and inability to overcome the sharp decline of charge and discharge rate performance, and achieve The preparation process is simple, the supercapacitor performance is excellent, and the cost is low

Active Publication Date: 2016-01-13
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of NiCo 2 S 4 Electrode materials are still unable to overcome the sharp decline in charge-discharge rate performance at the limiting current density, and the complexity of the preparation process is still an urgent problem to be solved in the preparation of sulfide supercapacitor electrodes.

Method used

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  • 3D-nanostructure NiCo2S4 electrode material for super capacitor and preparation method thereof
  • 3D-nanostructure NiCo2S4 electrode material for super capacitor and preparation method thereof
  • 3D-nanostructure NiCo2S4 electrode material for super capacitor and preparation method thereof

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preparation example Construction

[0029] The invention relates to a three-dimensional nanostructure NiCo 2 S 4 Electrode material and its preparation method. Three-dimensional nanostructured NiCo 2 S 4 The electrode material consists of hexagonal NiCo 2 S 4 The nanosheets self-assemble to form three-dimensional nanostructures.

[0030] Three-dimensional nanostructured NiCo 2 S 4 Electrode materials are prepared by hydrothermal method and subsequent vulcanization process, including:

[0031](1) Dissolve divalent cobalt salt and divalent nickel salt in alkaline aqueous solution, and obtain a three-dimensional intermediate product through hydrothermal reaction; (2) Disperse the obtained intermediate product in the sulfur source solution for hydrothermal vulcanization treatment, Three-dimensional nanostructured NiCo can be obtained 2 S 4 Material.

[0032] The present invention utilizes NiCo 2 S 4 On the basis of the high pseudocapacitive activity and high conductivity of the material, the specific su...

Embodiment 1

[0034] (1) Select cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) 2mmol, nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 1mmol and, urea 15mmol and ammonium fluoride (NH 4 F) Mix 6 mmol dissolved in 35 ml deionized water and obtain a clear solution by magnetic stirring.

[0035] (2) Transfer the solution to a 46ml polytetrafluoroethylene stainless steel reaction kettle, conduct a hydrothermal reaction at 100°C for 3 hours, wash the resulting precipitate with deionized water and absolute ethanol, and dry it at 60°C for 8 hours .

[0036] (3) Weigh 40mg of the above dried product, add it to 0.02mol / L (30ml) sodium sulfide solution, transfer it to a 46ml volume polytetrafluoroethylene stainless steel reaction kettle, and heat it in water at 160°C for 6 hours. After the product precipitate was washed with deionized water and absolute ethanol, it was vacuum-dried at 60 °C for 6 hours to obtain NiCo 2 S 4 .

Embodiment 2

[0038] (1) Select cobalt acetate tetrahydrate (Co(CH 3 COO) 2 4H 2 O) 2mmol, nickel acetate tetrahydrate (Ni(CH 3 COO) 2 4H 2 O) 1mmol and, urea 20mmol and ammonium fluoride (KF) 24mmol were mixed and dissolved in 35ml deionized water, and a clear solution was obtained by magnetic stirring.

[0039] (2) Transfer the solution to a 46ml polytetrafluoroethylene stainless steel reaction kettle, conduct a hydrothermal reaction at 120°C for 6 hours, wash the resulting precipitate with deionized water and absolute ethanol, and dry it at 60°C for 8 hours .

[0040] (3) Weigh 40mg of the above dried product, add it to 0.02mol / L (30ml) thiourea solution, transfer it to a 46ml volume polytetrafluoroethylene stainless steel reaction kettle, and heat it in water at 140°C for 4 hours. After the product precipitate was washed with deionized water and absolute ethanol, it was vacuum-dried at 60 °C for 6 hours to obtain NiCo 2 S 4 .

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Abstract

The invention relates to a 3D-nanostructure NiCo2S4 electrode material and a preparation method thereof. The 3D-nanostructure NiCo2S4 electrode material is in a three-dimensional nanostructure formed through self-assembly of hexagonal NiCo2S4 nanosheets. The 3D-nanostructure NiCo2S4 electrode material is prepared through a hydrothermal method and a follow-up sulfuration process. The preparation method comprises 1) dissolving divalent cobalt salt and divalent nickel salt into an alkaline aqueous solution, and obtaining an intermediate product in a three-dimensional structure through hydrothermal reaction; and 2) dispersing the obtained intermediate product into a sulfur source solution so as to carry out hydrothermal sulfidizing processing, and thus the 3D-nanostructure NiCo2S4 electrode material can be obtained. On the basis of high seudocapacitance activity and high conductivity of the NiCo2S4 material, specific surface area is improved by forming the 3D nanostructure, and the obtained product is allowed to have excellent super capacitor performance; the hydrothermal and follow-up sulfuration processing processes are simple and are easy to operate and control; and the method is suitable for continuous large-scale production.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to a three-dimensional nanostructure NiCo 2 S 4 Electrode material and its preparation method. Background technique [0002] Due to the heavy dependence on fossil fuels, environmental pollution has become an urgent problem to be solved. Countries all over the world have invested a lot of manpower and material resources to seek an uninterrupted energy supply. Green energy such as wind energy, solar energy, tidal energy, and geothermal energy has been gradually put into real-life applications, but it is still troubled by factors such as geography and sustainability. The development of new energy storage devices to meet the increasing energy demand has attracted the attention of researchers all over the world. Among them, with fast charge and discharge, high power density, excellent cycle stability and environmental friendliness, supercapacitors have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/26C01G53/00H01G11/86
CPCY02E60/13
Inventor 周敏陆飞曾祥华
Owner YANGZHOU UNIV
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