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NiCo2S4/XS (X=Ni, Co) composite nanometer material and preparation method and application thereof

A composite nanomaterial, CO2 technology, applied in the field of pseudocapacitive materials and preparation, can solve the problems of large environmental pollution, high price, scarcity of sources, etc., and achieve the effects of low price, increased contact area, and simple operation

Inactive Publication Date: 2017-06-27
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional pseudocapacitive materials are expensive, scarce and pollute the environment, so their applications are limited

Method used

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  • NiCo2S4/XS (X=Ni, Co) composite nanometer material and preparation method and application thereof
  • NiCo2S4/XS (X=Ni, Co) composite nanometer material and preparation method and application thereof
  • NiCo2S4/XS (X=Ni, Co) composite nanometer material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the first step, immerse the previously washed foamed nickel (1×1cm) in the uniformly mixed Ni 2+ 、Co 2+ , 80ml solution of urea (0.833g NiCl 2 ·6H 2 O, 0.357g CoCl 2 ·6H 2 (0, 0.910g urea), hydrothermal reaction at 130°C for 5 hours. Wash the nickel foam with the precursor, and dry it in a vacuum oven at 60°C.

[0027] In the second step, immerse the nickel foam with the precursor in 0.1M Na 2 In the S solution, first soak at 60°C for 5 hours; then, heat at 140°C for 5 hours. Wash and dry in a vacuum oven at 60°C to obtain NiCo 2 S 4 / NiS composite nanomaterials, refer to Figure 1 to Figure 2 .

Embodiment 2

[0029] In the first step, immerse the previously washed foamed nickel (1×1cm) in the uniformly mixed Ni 2+ 、Co 2+ , 80ml solution of urea (0.238g NiCl 2 ·6H 2 O, 1.190g CoCl 2 ·6H 2 (0, 0.910g urea), hydrothermal reaction at 130°C for 5 hours. Wash the nickel foam with the precursor, and dry it in a vacuum oven at 60°C.

[0030] In the second step, immerse the nickel foam with the precursor in 0.1M Na 2 In the S solution, first soak at 60°C for 5 hours; then, heat at 140°C for 5 hours. Wash and dry in a vacuum oven at 60°C to obtain NiCo 2 S 4 / CoS composite nanomaterials, ref. image 3 and Figure 4 .

Embodiment 3

[0032] Loaded NiCo prepared in Example 1 2 S 4 The nickel foam sheet of / NiS composite nanomaterial is used as the working electrode, and the Pt electrode and the Hg / HgO electrode are used as the counter electrode and reference electrode respectively to form a three-electrode system for electrochemical performance testing. Figure 5 for its discharge curve. It can be seen from the figure that the current density is 3mA cm -2 Lower mass specific capacitance 1947.5F g -1 ; at a current density of 10mAcm -2After charging and discharging 1000 times, it can still maintain 90% of the capacitance, reflecting a high specific capacitance and good cycle stability.

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Abstract

The invention discloses a NiCo 2 S 4 / XS (X=Ni, Co) composite nanomaterial and its preparation method, a composite nanomaterial NiCo was prepared on the foamed nickel substrate through two steps of hydrothermal and vulcanization. 2 S 4 / XS (X=Ni, Co) and use it as the electrode material of the supercapacitor. Compared with other materials, the doping of Ni and Co can improve the electrode surface roughness, conductivity, provide faster ion and electron transfer, and promote the Faradaic reversible reaction. As an electrode material without binder, the material exhibits excellent pseudocapacitive performance, and the preparation method is simple and novel.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to pseudocapacitive materials, preparation methods and applications in supercapacitors. Background technique [0002] In 1957, Becker proposed a capacitor based on a high specific surface area porous carbon material, which was the first patent related to supercapacitors and was awarded to General Electric. However, it was not until the 1990s that supercapacitor technology began to appear in the field of hybrid electric vehicles, and it has attracted widespread attention. Supercapacitors have the advantages of high power density, fast charging and discharging, long cycle life, and environmental friendliness, and have great application and research value in the fields of transportation, railways, green energy, electric power, and national defense, which have attracted many governments at home and abroad. Institutions, enterprises and institutions have invested a lot of time a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30
CPCY02E60/13H01G11/86H01G11/24H01G11/30
Inventor 林建明徐睿吴季怀范乐庆何欣
Owner HUAQIAO UNIVERSITY
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