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Graphene roll/carbon nanotube composite aerogel material, preparation and application thereof

A carbon nanotube composite, graphene roll technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problem that graphene performance cannot be fully utilized, and achieve good deformation adaptability, good mechanical properties, and inhibit stacking. Effect

Inactive Publication Date: 2016-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, due to the strong π-π interaction between graphene sheets, graphene sheets are easy to re-stack and form a graphite-like structure, so that the excellent properties of graphene itself cannot be fully utilized.

Method used

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  • Graphene roll/carbon nanotube composite aerogel material, preparation and application thereof
  • Graphene roll/carbon nanotube composite aerogel material, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Disperse graphite oxide in deionized water, and obtain 4mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0034] (2) Disperse the acidified carbon nanotubes in deionized water, and obtain 1mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0035] (3) 10mL 4mg mL -1 Graphene oxide dispersion and 10mL 1mg mL -1 The acidified carbon nanotube dispersion is mixed, and ultrasonicated for a period of time to form a uniform dispersion;

[0036] (4) Place the mixed solution of step (3) gained in the mold and freeze in liquid nitrogen for 20min;

[0037] (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;

[0038](6) Carry out high-temperature carbonization of the airgel obtained in step (5) in a nitrogen atmosphere, the carbonization temperat...

Embodiment 2

[0040] (1) Disperse graphite oxide in deionized water, and obtain 8mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0041] (2) Disperse the acidified carbon nanotubes in deionized water, and obtain 1mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

[0042] (3) 10mL 4mg mL -1 Graphene oxide dispersion and 10mL 1mg mL -1 The acidified carbon nanotube dispersion is mixed, and ultrasonicated for a period of time to form a uniform dispersion;

[0043] (4) Place the mixed solution of step (3) gained in the mold and freeze in liquid nitrogen for 20min;

[0044] (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;

[0045] (6) Carry out high-temperature carbonization of the airgel obtained in step (5) in a nitrogen atmosphere, the carbonization tempera...

Embodiment 3

[0047] (1) Disperse graphite oxide in deionized water, and obtain 4mg mL by ultrasonic -1 Stable dispersed graphene oxide dispersion;

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

[0049] (3) 10mL 4mg mL -1 Graphene oxide dispersion and 10mL 1mg mL -1 The acidified carbon nanotube dispersion is mixed, and ultrasonicated for a period of time to form a uniform dispersion;

[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 tempera...

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Abstract

The invention relates to a graphene roll / carbon nanotube composite aerogel material, preparation and application thereof. The composite material is a three-dimensional network skeleton structure composed of graphene and carbon nanotubes together. The preparation method consists of: mixing a graphene oxide dispersion solution and a carbon nanotube dispersion solution, and performing ultrasonic treatment to obtain a mixed solution, then conducting quenching in liquid nitrogen, freeze drying and carbonization, thus obtaining the composite aerogel material. The composite aerogel material can be applied as a flexible electrode or stress sensing material. According to the invention, by means of a simple liquid nitrogen quenching method, two-dimensional graphene and one-dimensional carbon nanotubes are compounded, the advantages of the two materials are brought into full play, and while graphene rolls are formed, the porous structure composite aerogel with good compression resilience can be obtained.

Description

technical field [0001] The invention belongs to the field of composite airgel and its preparation and application, in particular to a graphene roll / carbon nanotube composite airgel material 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. Therefore, graphene is widely used in electrochemical devices. However, in practical applications, due to the strong π-π interaction between graphene sheets, graphene sheets are easy to re-stack to form a graphite-like structure, so that the excellent properties of graphene itself cannot be fully utilized. Graphene nanosc...

Claims

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Application Information

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IPC IPC(8): C01B31/04H01M4/583
CPCC01P2004/03C01P2006/40H01M4/583Y02E60/10
Inventor 刘天西施贻琴樊玮郜伟左立增鲁恒毅
Owner DONGHUA UNIV
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