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Preparation method of nickel-cobalt sulfide material with three-dimensional nanostructure

A nickel-cobalt sulfide, three-dimensional nanotechnology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of energy storage devices limited by energy density and power balance, and achieve excellent electrochemical performance, The method is simple and practical, and the effect of large specific surface area

Active Publication Date: 2020-05-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the direct use of electrospinning technology to synthesize three-dimensional hierarchical structure nanomaterials of nickel cobalt sulfide, and the positive electrode materials of energy storage devices are limited by the balance between energy density and power

Method used

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  • Preparation method of nickel-cobalt sulfide material with three-dimensional nanostructure
  • Preparation method of nickel-cobalt sulfide material with three-dimensional nanostructure
  • Preparation method of nickel-cobalt sulfide material with three-dimensional nanostructure

Examples

Experimental program
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Effect test

Embodiment 1

[0062] 1) Preparation of Ni-Co-S electrode with tubular fiber structure

[0063] The samples of tubular fiber structure with different vulcanization times, acetylene black and polyvinylidene fluoride (PVDF) were weighed according to the mass ratio of 8:1:1, and the weighed powder was put into an agate mortar for grinding until three Mix the powder completely, then transfer the powder to a 25mm×25mm weighing bottle, put a magnetic stirrer, and slowly add N-methylpyrrolidone (NMP) dropwise to allow the solution to completely soak the powder, then place the weighing bottle on Stir for 4 hours on a magnetic stirrer to obtain a viscous liquid. Afterwards, the viscous liquid was scraped and coated on the cleaned carbon cloth with a blade, and then dried in a vacuum drying oven to obtain a flexible electrode sheet.

[0064] The size of the above-mentioned carbon cloth is 2cm×1.5cm, and the cleaning can be performed by adding acetone, deionized water, and absolute ethanol in sequence...

Embodiment 2

[0069] 1) Preparation of Ni-Co-S electrodes with nano-petal-like structure

[0070] The samples of nano petal-like structure, acetylene black and polyvinylidene fluoride (PVDF) with different vulcanization time were weighed according to the mass ratio of 8:1:1, and the weighed powder was put into an agate mortar for grinding until three Mix the seed powder completely, then transfer the powder to a weighing bottle of 25mm×25mm, put in a magnetic stirrer, and slowly add N-methylpyrrolidone (NMP) dropwise, so that the solution completely infiltrates the powder, and then place the weighing bottle Stir for 4 h on a magnetic stirrer to obtain a viscous liquid. Afterwards, the viscous liquid was scraped and coated on the cleaned carbon cloth with a blade, and then dried in a vacuum drying oven to obtain a flexible electrode sheet.

[0071] The size of the above-mentioned carbon cloth is 2cm×1.5cm, and the cleaning can be performed by adding acetone, deionized water, and absolute eth...

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Abstract

The invention discloses a preparation method of a nickel-cobalt sulfide material with a three-dimensional nanostructure, which relates to the nickel-cobalt sulfide material with the three-dimensionalnanostructure. Polyacrylonitrile nano fibers are prepared; a Ni-Co-S tubular fiber structure is prepared; and the Ni-Co-S hexagonal petal-shaped structure is prepared. The NiCO2S4 three-dimensional hierarchical structure nano material is prepared by utilizing an electrostatic spinning technology, has a unique three-dimensional nano structure, a relatively large specific surface area and excellentelectrochemical performance, and provides a new thought for preparing a supercapacitor positive electrode with excellent performance. The Ni-Co-S material has a large specific surface area and excellent electrochemical performance, and especially, the Ni-Co-S electrode with a hexagonal petal-shaped structure shows excellent performance when being used as a positive electrode of a supercapacitor. Therefore, the binary nickel-cobalt sulfide nanostructure is expected to become one of candidate materials for supercapacitor application. The method is simple and practical and can repeat a lot of operations.

Description

technical field [0001] The invention relates to a three-dimensional nanostructure nickel-cobalt sulfide material, in particular to a preparation method of a three-dimensional nanostructure nickel-cobalt sulfide material. Background technique [0002] Supercapacitors have attracted extensive attention due to their excellent power density, good cycle stability, and environmental friendliness. Due to the low specific capacitance of carbon-based materials, the poor cycle stability of conductive polymer materials, and the low conductivity of transition metal oxide materials, transition metal sulfides have been extensively studied as novel supercapacitor materials (Wu Z, Zhu Y, Ji X. NiCo2O4-based materials for electrochemical supercapacitors [J]. JOURNAL OF MATERIALS CHEMISTRY. A, 2014, 2(36): 14759-14772). At the same time, three-dimensional nanostructured materials have also been valued for their potential applications. Therefore, in order to improve the performance of superc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 叶美丹陈星贺春锋张鑫
Owner XIAMEN UNIV
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