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Porous conductive graphene/carbon nanohorn composite material, and preparation method and applications thereof

A carbon nanohorn, composite material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of short service life, unstable performance, and low cycle times

Active Publication Date: 2015-09-23
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, capacitors containing metals and metal oxides not only have the disadvantages of unstable performance, low cycle times, and short service life, but also have problems of toxicity and environmental pollution.
According to literature reports, the use of chemicals to disperse graphene and carbon nanotubes and the use of chemicals (such as hydrazine hydrate) to reduce graphene oxide not only has high synthesis costs, but also has toxicity and environmental pollution problems.

Method used

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  • Porous conductive graphene/carbon nanohorn composite material, and preparation method and applications thereof
  • Porous conductive graphene/carbon nanohorn composite material, and preparation method and applications thereof
  • Porous conductive graphene/carbon nanohorn composite material, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 50mg of single wall carbon nanohorns (Single wall carbon nanohorns) into 50mL of concentrated nitric acid, stir at 60°C for 12 hours, separate, wash with water, separate again, wash with water again, repeat 2, 3 times or more After that, it was dried in an oven at 70°C for use.

[0029] Prepare graphene oxide (or graphite powder or graphite oxide to synthesize graphene oxide first) or reduced graphene oxide in advance for use.

[0030] The 50mg graphene oxide and 10mg single-walled carbon nanohorns prepared above were dispersed in 30mL water at a weight ratio of 5:1, and ultrasonically dispersed for 3 hours to form graphene oxide and single-walled carbon nanohorns in water. Uniform colloid or suspension. Then transfer the colloid solution or suspension into a hydrothermal reactor, and carry out a hydrothermal reaction at a temperature of 180° C. for 18 hours. After the reaction was over, it was naturally cooled to room temperature. Soak the hydrogel-like product ...

Embodiment 2

[0033] Add 50mg of single wall carbon nanohorns (Single wall carbon nanohorns) into 50mL of concentrated nitric acid, stir at 60°C for 12 hours, separate, wash with water, separate again, wash with water again, repeat 2, 3 times or more After that, it was dried in an oven at 70°C for use.

[0034] Prepare graphene oxide (or graphite powder or graphite oxide to synthesize graphene oxide first) or reduced graphene oxide in advance for use.

[0035]The 50mg graphene oxide and 20mg single-walled carbon nanohorns prepared above were dispersed in 30mL of water at a weight ratio of 2.5:1, and ultrasonically dispersed for 3 hours to form graphene oxide and single-walled carbon nanohorns in water. Uniform colloid or suspension. Then the colloidal solution or suspension is transferred into a hydrothermal reactor, and the hydrothermal reaction is carried out at a temperature of 180° C. for 18 hours. After the reaction was over, it was naturally cooled to room temperature. Soak the hyd...

Embodiment 3

[0038] Disperse 50mg of graphene oxide (or graphite powder or graphite oxide first synthesized from graphene oxide) or reduced graphene oxide and 10-20mg of single-walled carbon nanohorns in a weight ratio of 5:1-2.5:1 in 30mL of water , Ultrasonic dispersion treatment, so that graphene oxide or reduced graphene oxide and single-walled carbon nanohorns form a uniform colloid or suspension in water. Then the colloidal solution or suspension is transferred into a hydrothermal reactor, and the hydrothermal reaction is carried out at a temperature of 180° C. for 18 hours. After the reaction was over, it was naturally cooled to room temperature. Soak the hydrogel-like product generated by the reaction in water, and after every 5 minutes, absorb the water, then add water to soak the hydrogel-like reaction product, repeat several times, and put the hydrogel-like product into water. The reaction product of the gel was placed overnight at room temperature and allowed to dry naturally ...

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Abstract

The invention provides a Porous conductive graphene / carbon nanohorn composite material. The composite material is characterized in that carbon nanohorn is distributed between graphene sheet layers or on the surfaces of the graphene sheet layers. The composite material effectively prevents or reduces lamination and agglomeration of the graphene sheet layers, a lot of hierarchical structural pores including micropores and meso pores are formed, and the specific surface area is large; and graphene plays a bridging role among the carbon nanohorns, a conductive network structure is formed, and the conductivity is enhanced. The invention also provides a preparation method and applications of the composite material, the material can be used as electrode material or additive in super capacitors, lithium ion batteries, fuel cells and the like, the electrode material is large in electric capacity and high in charging and discharging speed, and the circulation times are increased.

Description

technical field [0001] The invention relates to a porous conductive graphene / carbon nanohorn composite material and a preparation method thereof, belonging to the fields of materials, electrochemistry, energy storage and environmental protection. Background technique [0002] In the past few decades, due to their good electrical conductivity, large specific surface area, and good chemical and mechanical stability, carbon materials have been widely used in the fields of electronics, chemical industry, machinery, and environmental protection, especially in clean energy storage, such as electrochemical storage. Energy (such as lithium-ion batteries, supercapacitors) and other aspects have attracted widespread attention. Among them, carbon materials such as carbon fibers (CNFs), carbon nanotubes (CNTs), and graphene have broad application prospects in electrodes or as important additives in high-performance electrochemical energy storage devices. For example, although the theor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/32H01G11/24B82Y30/00B82Y40/00H01M4/587H01M4/62H01M4/86H01M4/88
CPCB82Y30/00B82Y40/00H01G11/24H01G11/32H01G11/36H01M4/587H01M4/62H01M4/86H01M4/88Y02E60/10Y02E60/13Y02E60/50
Inventor 陶有胜马来
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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