a kind of ceo 2 Nanoparticle-modified co 3 the s 4 Preparation method of nanosheet array

A nanosheet array and nanoparticle technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of easy agglomeration, reduce the utilization rate of active materials and cycle stability, and achieve a simple and effective preparation method. , good electrochemical cycle stability, the effect of promoting electron transfer

Active Publication Date: 2022-01-04
宁波市大学科技园发展有限公司
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  • Application Information

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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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  • a kind of ceo <sub>2</sub> Nanoparticle-modified co <sub>3</sub> the s <sub>4</sub> Preparation method of nanosheet array
  • a kind of ceo <sub>2</sub> Nanoparticle-modified co <sub>3</sub> the s <sub>4</sub> Preparation method of nanosheet array
  • a kind of ceo <sub>2</sub> Nanoparticle-modified co <sub>3</sub> the s <sub>4</sub> Preparation method of nanosheet array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0041] (2) Take 0.30g of Co(NO 3 ) 2 ·6H 2 O and 0.65g of 2-methylimidazole were dissolved in 20mL 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°C, and the reaction...

Embodiment 2

[0052] (1) Take 0.30g of Co(NO 3 )2·6H 2 O and 0.65g 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 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 of hexamethylenetetramine were each dissolved in 20 mL of ethanol to obtain solution C and solution D. Mix solution C and solution D 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, C...

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 0.667 g of hexamethylenetetramine were each dissolved in 20 mL of ethanol to obtain solution C and solution D. Mix solution C and solution D 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 dryi...

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Abstract

The invention provides a CeO 2 Nanoparticle-modified Co 3 S 4 Preparation methods of nanosheet arrays. The side comprises the following steps: adding nickel foam after mixing cobalt salt, imidazole ligand and solvent, and growing zeolite imidazolate framework Co-ZIF-L nanosheet array on the nickel foam substrate by reaction; then, adding Co-ZIF- L nanosheet arrays were added to the sulfur source solution to generate Co by hydrothermal vulcanization 3 S 4 Nanosheet array; add cerium salt, precipitant, and solvent to the precursor, and obtain CeO through solvothermal reaction 2 Nanoparticle-modified Co 3 S 4 Nanosheet arrays. CeO prepared by this method 2 Nanoparticle-modified Co 3 S 4 Nanosheet arrays, which can be directly used as electrodes for supercapacitors, with Co 3 S 4 Compared with the nanosheet array precursor, the specific capacitance is increased by 114.8% (under the condition of 0.5A / 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 Patents(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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