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Method for preparing graphene/carbon nanotube hybrid in hierarchical structure

A carbon nanotube and hierarchical structure technology, applied in the field of new energy materials, can solve the problems of harsh atmosphere conditions, affecting the performance of hybrids, and destroying the graphene structure, and achieves the effects of environmental friendliness, low cost, and large effective specific surface area

Active Publication Date: 2012-12-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of the above technologies are: the introduction of toxic reducing agents will pollute the environment, and their reduction process will also cause a certain degree of damage to the structure of graphene, which directly affects the performance of hybrids.
However, this technology has the disadvantages of demanding atmosphere conditions and high energy consumption

Method used

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  • Method for preparing graphene/carbon nanotube hybrid in hierarchical structure
  • Method for preparing graphene/carbon nanotube hybrid in hierarchical structure
  • Method for preparing graphene/carbon nanotube hybrid in hierarchical structure

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of hierarchical structure graphene / carbon nanotube hybrid, comprising the following steps:

[0032] (1) Preparation of graphene oxide colloidal solution

[0033] Disperse graphite oxide in deionized water, control the concentration of graphite oxide to 6 mg / mL, add a small amount of ammonia water dropwise to adjust the pH value of the solution between 9 and 11, stir at room temperature for 48 hours, and remove unstripped oxide by low-speed centrifugation. Graphite, obtain graphene oxide colloidal solution.

[0034] (2) Preparation of easily dispersible carbon nanotube colloidal solution

[0035] Put 2 grams of carbon nanotubes into 98% sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) in the mixed acid, H 2 SO 4 with HNO 3 The volume ratio was 3:1, the concentration of carbon nanotubes in the mixed acid solution was controlled to 10 mg / mL, mechanically stirred at 60°C for 48 hours, ultrasonically treated for 4 hours, and then washed with dei...

Embodiment 2

[0075] A preparation method of hierarchical structure graphene / carbon nanotube hybrid, comprising the following steps:

[0076] (1) Preparation of graphene oxide colloidal solution

[0077] Disperse graphite oxide in deionized water, control the concentration of graphite oxide to 10 mg / mL, add a small amount of ammonia water dropwise to adjust the pH value of the solution between 9 and 11, stir at room temperature for 72 hours, and remove unstripped oxide by low-speed centrifugation. Graphite, obtain graphene oxide colloidal solution.

[0078] (2) Preparation of easily dispersible carbon nanotube colloidal solution

[0079] Put 1 gram of carbon nanotubes into 98% sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) in the mixed acid, H 2 SO 4 with HNO 3 The volume ratio was 3:1, the concentration of carbon nanotubes in the mixed acid solution was controlled to 5 mg / mL, mechanically stirred at 60°C for 24 hours, ultrasonically treated for 4 hours, and then washed with deio...

Embodiment 3

[0088] A preparation method of hierarchical structure graphene / carbon nanotube hybrid, comprising the following steps:

[0089] (1) Preparation of graphene oxide colloidal solution

[0090] Disperse graphite oxide in deionized water, control the concentration of graphite oxide to 0.1 mg / mL, add a small amount of ammonia water dropwise to adjust the pH value of the solution between 9 and 11, stir at room temperature for 48 hours, and remove unstripped oxide by low-speed centrifugation. Graphite, obtain graphene oxide colloidal solution.

[0091] (2) Preparation of easily dispersible carbon nanotube colloidal solution

[0092] Put 5 grams of carbon nanotubes into 98% sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) in the mixed acid, H 2 SO 4 with HNO 3 The volume ratio was 3:1, the concentration of carbon nanotubes in the mixed acid solution was controlled to 100 mg / mL, mechanically stirred at 60°C for 72 hours, ultrasonically treated for 6 hours, and then washed with ...

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Abstract

The invention relates to the technical field of new energy resources, in particular to a method for preparing a graphene / carbon nanotube hybrid in a hierarchical structure. The method includes the steps: (1) preparing graphene oxide colloidal solution; (2) preparing carbon nanotube colloidal solution easy in dispersion; (3) mixing the graphene oxide colloidal solution obtained at the step (1) and the preparing carbon nanotube colloidal solution easy in dispersion obtained at the step (2), and adding alcohol solvents to obtain graphene oxide / carbon nanotube hybrid solution; and (4) under the shielding of inert gases, using a high-energy ray radiation source for irradiation and reduction of products obtained at the step (3) to obtain the graphene / carbon nanotube hybrid in the hierarchical structure. The method for preparing the graphene / carbon nanotube hybrid in the hierarchical structure has the advantages of simplicity in process, low cost, high controllability, environment friendliness and capability of implementing industrial production, and the hybrid prepared by the method is in an surface-line network structure, large in effective specific surface area and beneficial to charge transmission and can be used for electrode materials of high-performance supercapacitors.

Description

Technical field [0001] The present invention involves the field of new energy materials technology, and the preparation of supercapacitors electrode materials involves the preparation of supercapacitors electrode materials. It is a preparation method of graded structure graphene / carbon nanoma hybrid. Background technique [0002] As a two -dimensional nano -carbon material, graphene has the characteristics of unique chemical structure, large ratio area, high conductivity, excellent mechanical properties, and other characteristics.As well as the field of high -performance composite materials, extensive application prospects are present.However, because graphene is prone to irreversible reunion due to the effect of Van Dehua, it makes it difficult for single -layer graphene to play its inherent excellent characteristics.Therefore, the problem of solving the gatsene layer of graphene is an urgent need to solve. [0003] Because of its excellent conductivity and chemical stability, o...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 王庚超孙敏强施静蔚李春忠
Owner EAST CHINA UNIV OF SCI & TECH
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