Preparation method and application of spongy graphene/nickel-cobalt sulfide composite material

A technology of nickel-cobalt sulfide and composite materials, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of lower specific surface area, easy agglomeration of graphene, and unsatisfactory performance, and achieve high specific surface area, simple impurity removal process, and low pollution Effect

Active Publication Date: 2018-12-14
福建宸琦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when pure graphene is used as a supercapacitor electrode material, its performance cannot meet people's requirements. On the one hand, graphene prepared by chemical methods is easy to agglomerate due to the π-π force between the sheets, resulting in a decrease in its specific surface area; On the one hand, limited by the mechanism of electric double layer capacitance, its specific capacitance cannot be compared with that of Faraday quasi-capacitance

Method used

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  • Preparation method and application of spongy graphene/nickel-cobalt sulfide composite material
  • Preparation method and application of spongy graphene/nickel-cobalt sulfide composite material
  • Preparation method and application of spongy graphene/nickel-cobalt sulfide composite material

Examples

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Embodiment 1

[0032] A kind of preparation method of spongy graphene / nickel-cobalt sulfide composite material, concrete process is as follows:

[0033] (1) Weigh 0.1g of graphene oxide and 1g of sodium dodecylbenzenesulfonate and dissolve them in 20mL of deionized water respectively, mix the two and ultrasonicate, the ultrasonic power is 200W, the ultrasonic temperature is 25°C, and the ultrasonic time is 2h;

[0034] (2) Weigh 0.3g of sulfur and ultrasonically disperse it in 20mL of n-octane, add the obtained n-octane mixture dropwise to the solution obtained in step (1), and stir magnetically for 60 minutes;

[0035] (3) Weigh 0.2g of nickel nitrate and 0.1g of cobalt nitrate and dissolve them in deionized water, and add them dropwise to the mixed solution in step (2), and stir magnetically for 30 minutes;

[0036] (4) Transfer the mixture obtained in step (3) to a 100mL Teflon-lined stainless steel autoclave, then place it in an oil bath, and place it in an oil bath at 180°C for 24 hour...

Embodiment 2

[0040] A kind of preparation method of spongy graphene / nickel-cobalt sulfide composite material, concrete process is as follows:

[0041] (1) Weigh 0.1g of graphene oxide and 1g of sodium dodecylbenzenesulfonate and dissolve them in 20mL of deionized water respectively, mix the two and ultrasonicate, the ultrasonic power is 200W, the ultrasonic temperature is 25°C, and the ultrasonic time is 2h;

[0042] (2) Weigh 0.3g of sulfur and ultrasonically disperse it in 20mL of n-octane, add the obtained n-octane mixture dropwise to the solution obtained in step (1), and stir magnetically for 60 minutes;

[0043] (3) Weigh 0.15g of nickel nitrate and 0.15g of cobalt nitrate and dissolve them in deionized water, and add them dropwise to the mixed solution in step (1), and stir magnetically for 30 minutes;

[0044] (4) Transfer the mixture obtained in step (3) to a 100mL Teflon-lined stainless steel autoclave, then place it in an oil bath, and place it in an oil bath at 180°C for 24 ho...

Embodiment 3

[0048] A kind of preparation method of spongy graphene / nickel-cobalt sulfide composite material, concrete process is as follows:

[0049] (1) Weigh 0.1g of graphene oxide and 1g of sodium dodecylbenzenesulfonate and dissolve them in 20mL of deionized water respectively, mix the two and ultrasonicate, the ultrasonic power is 200W, the ultrasonic temperature is 25°C, and the ultrasonic time is 2h;

[0050] (2) Weigh 0.3g of sulfur and ultrasonically disperse it in 20mL of n-octane, add the obtained n-octane mixture dropwise to the solution obtained in step (1), and stir magnetically for 60 minutes;

[0051] (3) Weigh 0.1g of nickel nitrate and 0.2g of cobalt nitrate and dissolve them in deionized water, and add them dropwise to the mixed solution in step (2), and stir magnetically for 30 minutes;

[0052] (4) Transfer the mixture obtained in step (3) to a 100mL Teflon-lined stainless steel autoclave, then place it in an oil bath, and place it in an oil bath at 180°C for 24 hour...

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Abstract

The invention belongs to the field of nanometer materials and electrochemistry, in particular to a preparation method of a spongy graphene / nickel-cobalt sulfide composite material. Deionized water andn-octane are used as a solvent, sulfur, nickel nitrate and cobalt nitrate are used as a sulfur source, a nickel source and a cobalt source, sodium dodecyl benzene sulfonate is used as a surfactant, in a stainless steel autoclave, magnetic stirring is provided, reaction is performed at a certain temperature for a period of time to obtain a spongy graphene / nickel-cobalt sulfide composite material,and the composite material is coated on the surface of nickel foam, dried in vacuum and pressed into an electrode material. By regulating the morphology of the composite material, the prepared graphene / nickel-cobalt sulfide composite material has a larger specific surface area when serving as a composite electrode material, thereby fully contacting the composite material with an electrolyte, and greatly improving the electrochemical performance.

Description

technical field [0001] The invention belongs to the field of nanomaterials and electrochemistry, and in particular relates to a preparation method and application of a sponge-like graphene / nickel-cobalt sulfide composite material. Background technique [0002] In the 21st century, "energy" has become the focus of competition among countries. Facing the coming energy crisis, while trying to find new energy sources, scientists are actively developing energy-saving and efficient energy storage devices. Among new energy storage devices, supercapacitors are attracting more and more attention because of their advantages such as high power density, fast charging and discharging speed, and long cycle life. Among the many components of supercapacitors, the characteristics and combination of electrode materials have a great influence on the performance of supercapacitors. [0003] Graphene is a two-dimensional allotrope of carbon, which combines many excellent properties, such as hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 郑玉婴赵文誉
Owner 福建宸琦新材料科技有限公司
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