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A preparation method and application of a composite film electrode with CoZn-S nanoparticles inserted into graphene

A composite film and nanoparticle technology, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors to achieve the effects of reducing manufacturing costs, enhancing flexibility and conductivity, and reducing impedance

Inactive Publication Date: 2019-12-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is no report on the preparation and application of CoZn-S nanoparticles derived from CoZn-MOF and graphene to form a sandwich composite thin film electrode material in supercapacitors.

Method used

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  • A preparation method and application of a composite film electrode with CoZn-S nanoparticles inserted into graphene
  • A preparation method and application of a composite film electrode with CoZn-S nanoparticles inserted into graphene
  • A preparation method and application of a composite film electrode with CoZn-S nanoparticles inserted into graphene

Examples

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Effect test

Embodiment 1

[0029] A preparation method of rGO@CoZn-S composite thin film electrode material: first, 0.582g Co(NO 3 ) 2 ·6H 2 O, 0.2975gZn(NO 3 ) 2 ·6H 2 O and 1.3gmmol 2-methylimidazole were dissolved in 40 mL deionized water respectively, and then the prepared Co(NO 3 )2 ·6H 2 O and Zn(NO 3 ) 2 ·6H 2 The O solution was mixed and stirred at room temperature for 1 min, and then the ultrasonically dispersed 2-methylimidazole solution was mixed with the above mixed solution to obtain a CoZn-MOF aqueous suspension.

[0030] In this example, the volume ratio of cobalt-zinc-MOF aqueous solution and GO aqueous solution is 5 / 50. Weigh 0.01 g of negatively charged GO and dissolve it in 50 mL of deionized water, and ultrasonicate the above solution for 15 min. Measure 5 ml of cobalt-zinc MOF aqueous solution and add it to the graphene solution and let it stand for 60 min. Then, a GO@CoZn-MOF sandwich composite film was formed by vacuum filtration, and finally the GO@CoZn-MOF sandwich com...

Embodiment 2

[0032] A preparation method of rGO@CoZn-S composite thin film electrode material: first, 0.582g Co(NO 3 ) 2 ·6H 2 O, 0.2975gZn(NO 3 ) 2 ·6H 2 O and 1.3gmmol 2-methylimidazole were dissolved in 40 mL deionized water respectively, and then the prepared Co(NO 3 ) 2 ·6H 2 O and Zn(NO 3 ) 2 ·6H 2 The O solution was mixed and stirred at room temperature for 1 min, and then the ultrasonically dispersed 2-methylimidazole solution was mixed with the above mixed solution to obtain a CoZn-MOF aqueous suspension.

[0033] In this example, the volume ratio of cobalt-zinc-MOF aqueous solution and GO aqueous solution is 7 / 50. Weigh 0.01 g of negatively charged GO and dissolve it in 50 mL of deionized water and ultrasonicate the above solution for 20 min. Measure 7 ml of cobalt-zinc MOF aqueous solution and add it to the graphene solution and let it stand for 60 min. Then, a GO@CoZn-MOF sandwich composite film was formed by vacuum filtration, and finally a GO@CoZn-MOF sandwich comp...

Embodiment 3

[0035] A preparation method of rGO@CoZn-S composite thin film electrode material: first, 0.582g Co(NO 3 ) 2 ·6H 2 O, 0.2975gZn(NO 3 ) 2 ·6H 2 O and 1.3gmmol 2-methylimidazole were dissolved in 40 mL deionized water respectively, and then the prepared Co(NO 3 ) 2 ·6H 2 O and Zn(NO 3 ) 2 ·6H 2 The O solution was mixed and stirred at room temperature for 1 min, and then the ultrasonically dispersed 2-methylimidazole solution was mixed with the above mixed solution to obtain a CoZn-MOF aqueous suspension.

[0036] In the present invention, the volume ratio of cobalt-zinc-MOF aqueous solution and GO aqueous solution is 9 / 50. Weigh 0.01 g of negatively charged GO and dissolve it in 50 mL of deionized water, and ultrasonicate the above solution for 20 min. Measure 9 ml of cobalt-zinc MOF aqueous solution and add it to the graphene solution and let it stand for 60 min. Then, a GO@CoZn-MOF sandwich composite film was formed by vacuum filtration, and finally the GO@CoZn-MOF s...

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Abstract

The invention belongs to the technical field of composite electrode material preparation, and relates to a preparation method of a composite film electrode with CoZn-S nanoparticles inserted into graphene (rGO@CoZn-S) and application of the composite film electrode to a supercapacitor. The preparation method comprises the following steps: firstly, preparing a Co(NO3)2 solution and a Zn(NO3)2 solution and uniformly mixing and stirring the Co(NO3)2 solution and the Zn(NO3)2 solution in a volume ratio of 1: 2-2: 1, and adding a 0.4 mol / L 2-methylimidazole solution which is uniformly dispersed byultrasonic processing and carrying out uniform mixing to obtain CoZn-MOF turbid liquid; then, measuring the prepared CoZn-MOF turbid liquid and adding the measured CoZn-MOF turbid liquid into a graphene solution, carrying out standing and vacuum filtration to obtain a GO@CoZn-MOF sandwich-shaped composite film; and finally, ultrasonically dispersing thioacetamide and absolute ethyl alcohol uniformly, transferring the obtained solution to a reaction kettle and soaking the GO@CoZn-MOF composite film in the solution, keeping the reaction kettle under a constant temperature of 90-120 DEG C for 1-3hours, cooling to room temperature, taking out the sample and carrying out cleaning and drying in vacuum. The graphene is used as a substrate, so that the flexibility and conductivity of the materialare enhanced to a great extent; and meanwhile, CoZn-S nanoparticles derived from CoZn-MOF directly grow on the surface of the graphene in situ and can be used as an electrode material, thereby preventing the use of adhesives and conductive agents.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite electrode materials, and relates to a composite thin film electrode, in particular to a method for preparing a composite thin film electrode in which CoZn-S nanoparticles are interspersed in graphene (rGO@CoZn-S) and its application. Background technique [0002] In recent years, due to the increasing global population and rapid economic development, the depletion of traditional fossil fuels such as coal, oil, and natural gas has caused a series of serious environmental problems such as the greenhouse effect and smog. Therefore, the development of new pollution-free energy sources and the design of new environmentally friendly energy storage devices are one of the top priorities. As a new type of energy storage device between traditional chemical power sources and electrostatic capacitors, supercapacitors are widely used in Electronic equipment, hybrid electric vehicles, backup p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/36
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 刘瑜辛娜
Owner JIANGSU UNIV