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Nickel hydroxide/graphene roll-carbon nano-tube composite carbon aerogel, preparation thereof and application thereof

A carbon nanotube composite and acidified carbon nanotube technology, which is applied in the manufacture of hybrid/electric double layer capacitors, electrical components, hybrid capacitor electrodes, etc., can solve problems such as limiting performance, achieve uniform distribution, simple preparation process, good electrical The effect of chemical properties

Inactive Publication Date: 2016-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel hydroxide nanomaterials are easy to agglomerate and limit its performance.

Method used

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  • Nickel hydroxide/graphene roll-carbon nano-tube composite carbon aerogel, preparation thereof and application thereof
  • Nickel hydroxide/graphene roll-carbon nano-tube composite carbon aerogel, preparation thereof and application thereof
  • Nickel hydroxide/graphene roll-carbon nano-tube composite carbon aerogel, preparation thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Disperse graphite oxide in deionized water, and obtain 8mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0037] (2) Disperse the acidified carbon nanotubes in deionized water, and obtain 4mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0038] (3) 10mL 8mg mL -1 Graphene oxide dispersion and 10mL 4mg mL -1 The acidified carbon nanotube dispersion is mixed, and after ultrasonication, a uniform dispersion is formed;

[0039] (4) Place the mixed solution of step (3) gained in the mold and freeze in liquid nitrogen for 20min;

[0040](5) freeze-dry the composite material obtained in step (4) in a freeze-drying machine, the freeze-drying temperature is -30°C, the vacuum is 10Pa, and the freeze-drying time is 20h to form a graphene oxide roll-carbon nanotube composite gas gel;

[0041] (6) Carry out high-temperature carbonization of the airgel obtained in step (5) in a nitrogen atmosphere, the carbonization temperature is 700 ...

Embodiment 2

[0047] (1) Disperse graphite oxide in deionized water, and obtain 8mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0048] (2) Disperse the acidified carbon nanotubes in deionized water, and obtain 4mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0049] (3) 10mL 8mg mL -1 Graphene oxide dispersion and 10mL 4mg mL -1 The acidified carbon nanotube dispersion is mixed, and after ultrasonication, a uniform dispersion is formed;

[0050] (4) Place the mixed solution of step (3) gained in the mold and freeze in liquid nitrogen for 20min;

[0051] (5) freeze-dry the composite material obtained in step (4) in a freeze-drying machine, the freeze-drying temperature is -30°C, the vacuum is 10Pa, and the freeze-drying time is 20h to form a graphene oxide roll-carbon nanotube composite gas gel;

[0052] (6) Carry out high-temperature carbonization of the airgel obtained in step (5) in a nitrogen atmosphere, the carbonization temperature is 700...

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Abstract

The present invention relates to a nickel hydroxide / graphene roll-carbon nano-tube composite carbon aerogel, a preparation thereof and an application thereof. The composite carbon aerogel is composed of a composite carbon aerogel skeleton and a nickel hydroxide nano sheet formed on the surface of the composite carbon aerogel skeleton through the in-situ growth process. The preparation of the composite carbon aerogel comprises the steps of adding a graphene roll-carbon nano-tube composite carbon aerogel into a nickel nitrate solution, subjecting the above materials to deposition reaction in a chemical bath, washing and drying to obtain the composite carbon aerogel. According to the technical scheme of the invention, in the simple chemical and deposition means, the nickel hydroxide having pseudo-capacitive properties is compounded with the graphene roll-carbon nano-tube aerogel having double-electrode-layer capacitance properties, so that the advantages of the nickel hydroxide and the graphene roll-carbon nano-tube aerogel are given full play to. Therefore, the obtained material is excellent in electrochemical performance and high in capacitive character.

Description

technical field [0001] The invention belongs to the field of composite airgel and its preparation and application, in particular to a nickel hydroxide / graphene roll-carbon nanotube composite carbon airgel and its preparation and application. Background technique [0002] Graphene has a unique monolithic two-dimensional structure, which is composed of sp 2 Carbon atoms are arranged in a hexagonal manner. At the same time, graphene has a high internal carrier mobility (200000cm 2 V -1 the s -1 ), good thermal conductivity (~5000W m -1 K -1 ), high light transmittance (~97.7%) and theoretical specific surface area (2630m 2 g -1 ), and excellent mechanical strength. Carbon nanotubes have unique properties such as high carrier mobility, good electrical conductivity, high specific surface area, and large aspect ratio, and are widely used in sensing, energy storage devices and other fields. It is mixed with graphene to make aerogels. Part of the carbon nanotubes are attach...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/24H01M4/36
CPCH01G11/24H01G11/30H01G11/86H01M4/366Y02E60/10
Inventor 刘天西施贻琴樊玮郜伟张由芳左立增
Owner DONGHUA UNIV
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