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Preparation method of Co3S4 nanosheet array modified by CeO2 nanoparticles

A nanosheet array and nanoparticle technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of easy agglomeration, lower utilization rate of active materials and cycle stability, and achieve simple and effective preparation methods Effect

Active Publication Date: 2021-01-01
宁波市大学科技园发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then Co 3 S 4 Nanopowders are prone to agglomeration during practical application, which reduces the utilization rate and cycle stability of active materials

Method used

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  • Preparation method of Co3S4 nanosheet array modified by CeO2 nanoparticles
  • Preparation method of Co3S4 nanosheet array modified by CeO2 nanoparticles
  • Preparation method of Co3S4 nanosheet array modified by CeO2 nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) The nickel foam is pretreated with hydrochloric acid and acetone respectively to remove impurities such as oxides and oil stains on the surface.

[0041] (2) Take 0.30g of Co(NO 3 ) 2 ·6H 2 O and 0.65 g of 2-methylimidazole were dissolved in 20 mL of deionized water respectively to obtain solution A and solution B. After fully mixing and stirring solution A and solution B, put in pretreated foamed nickel (2×3cm 2 ), stood at room temperature for 4h, took out, washed and dried to obtain Co-ZIF-L-NSAs / NF.

[0042] The scanning electron microscope picture of the Co-ZIF-L-NSAs / NF prepared above is as follows: figure 1 As shown, the right figure is a partially enlarged view of the left figure. From figure 1 It can be seen that Co-ZIF-L has a 2D nanosheet structure and a smooth surface.

[0043] (3) Put Co-ZIF-L-NSAs / NF into a solution of 0.15g thioacetamide dissolved in 50mL of absolute ethanol in advance for hydrothermal reaction, the reaction temperature is 120°...

Embodiment 2

[0052] (1) Take 0.30g of Co(NO 3 )2·6H 2 O and 0.65 g of 2-methylimidazole were dissolved in 20 mL of deionized water respectively to obtain solution A and solution B. After fully mixing and stirring the A and B solutions, put in the pretreated foamed nickel (2×3cm 2 ), stood at room temperature for 4h, took out, washed and dried to obtain Co-ZIF-L-NSAs / NF.

[0053] (2) Put Co-ZIF-L-NSAs / NF into a solution of 0.30 g of thioacetamide dissolved in 50 mL of absolute ethanol in advance for hydrothermal reaction, the reaction temperature is 130° C., and the reaction time is 6 h. After washing and drying, Co 3 S 4 -NSAs / NFs.

[0054] (3) Take 0.21g Ce(NO 3 ) 3 ·6H 2 O and 0.4 g hexamethylenetetramine, each dissolved in 2 0mL of ethanol to obtain solution A and solution B. Mix solution A and solution B thoroughly, put in Co 3 S 4 -NSAs / NF were subjected to solvothermal reaction, the reaction temperature was 180℃, and the reaction time was 6h. After washing and drying, Co...

Embodiment 3

[0059] (1) Take 0.31g of Co(NO 3 ) 2 ·6H 2 O and 0.66g of 2-methylimidazole were dissolved in 20mL deionized water respectively to obtain solution A and solution B. After fully mixing and stirring the A and B solutions, put in the pretreated foamed nickel (2×3cm 2 ), stood at room temperature for 4h, took out, washed and dried, and obtained Co-ZIF-L-NSAs / NF.

[0060] (2) Put Co-ZIF-L-NSAs / NF into a solution of 0.30 g of thioacetamide dissolved in 50 mL of absolute ethanol in advance for hydrothermal reaction at a reaction temperature of 120° C. and a reaction time of 4 h. After washing and drying, Co 3 S 4 -NSAs / NFs.

[0061] (3) Take 0.35g Ce(NO 3 ) 3 ·6H 2O and 0.667g of hexamethylenetetramine were each dissolved in 20mL of ethanol to obtain solution A and solution B. Mix solution A and solution B thoroughly, put in Co 3 S 4 -NSAs / NF were subjected to solvothermal reaction, the reaction temperature was 150℃, and the reaction time was 5h. After washing and drying...

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Abstract

The invention provides a preparation method of a Co3S4 nanosheet array modified by CeO2 nanoparticles. The method comprises the following steps: mixing a cobalt salt, an imidazole ligand and a solvent, adding foamed nickel, and growing a zeolite imidazolate framework CoZIFL nanosheet array on a foamed nickel substrate through a reaction; then, adding the CoZIFL nanosheet array into a sulfur sourcesolution, and generating a Co3S4 nanosheet array through hydrothermal vulcanization; and adding cerium salt, a precipitator and a solvent into the precursor, and obtaining a CeO2 nanoparticle modified Co3S4 nanosheet array through solvothermal reaction. The CeO2 nanoparticle modified Co3S4 nanosheet array prepared by adopting the method can be directly used as an electrode of a supercapacitor, and compared with a Co3S4 nanosheet array precursor, the specific capacitance of the CeO2 nanoparticle modified Co3S4 nanosheet array prepared by adopting the method is improved by 114.8% (under the condition of 0.5 A / g).

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a CeO 2 Nanoparticle-modified Co 3 S 4 Preparation methods of nanosheet arrays. Background technique [0002] As a new type of green energy storage device, supercapacitor has attracted extensive attention in its technical research. Electrode materials are the core components of supercapacitors. Therefore, electrode materials for supercapacitors are the focus of current research. co 3 S 4 Due to their excellent electrochemical properties, various Co 3 S 4 Nanostructures are widely used in supercapacitors. Then Co 3 S 4 Nanopowders are prone to agglomeration during practical application, which reduces the utilization rate and cycle stability of active materials. Constructing Co directly on conductive substrates 3 S 4 Nanosheet arrays can fully expose active stable points, reduce agglomeration, and enhance conductivity. [0003] In recent years, nano-CeO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/48H01G11/86
CPCH01G11/24H01G11/46H01G11/30H01G11/86H01G11/48Y02E60/13
Inventor 陶凯薛志高韩磊
Owner 宁波市大学科技园发展有限公司
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