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Method for preparing graphene/carbon nanotube composite material by intensive microwave process

A technology of graphene carbon and composite materials, which is applied in the field of graphene carbon nanotube composite materials prepared by powerful microwave method, which can solve the problems of low energy density and achieve pollution-free production methods, suitable for large-scale industrial production, and safe production methods reliable effect

Active Publication Date: 2016-06-08
临沂星火知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low energy density is a key factor restricting the development and application of supercapacitors. Exploring how to improve the energy density of supercapacitors is the focus of current research in this field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Add 2.2 g of graphite into a beaker containing 105 mL of concentrated sulfuric acid at room temperature, then slowly add 16 g of potassium permanganate in an ice bath, then transfer the reaction solution to a water bath at 29°C and stir for 23 minutes to complete the reaction. After adding 430mL of ice water for dilution, add dropwise a mass fraction of 14% H 2 o 2 solution until no bubbles are generated. Perform suction filtration and rinse the obtained golden yellow filter cake with a large amount of water, and dry the obtained powder in a vacuum oven at 32°C overnight;

[0016] 2) Put the graphite oxide powder prepared in step 1 into a glass vial, place it in a microwave oven, and microwave at 1000W for 30s to obtain MRGO;

[0017] 3) Put 16mg of MRGO and 33mg of ferrocene together into an agate mortar and grind for 15min. After mixing evenly, transfer the uniformly mixed black powder into a glass vial and microwave at 1000W for 44s to obtain a black Gr / CNTs com...

Embodiment 2

[0019] 1) Add 3.6g of graphite into a beaker containing 112mL of concentrated sulfuric acid at room temperature, then slowly add 18g of potassium permanganate in an ice bath, then transfer the reaction solution to a water bath at 30°C and stir for 44min to react. After the end, add 390mL of ice water to dilute, add dropwise a mass fraction of 16% H 2 o 2 solution until no bubbles are generated. Perform suction filtration and rinse the obtained golden yellow filter cake with a large amount of water, and dry the obtained powder in a vacuum oven at 42°C overnight;

[0020] 2) Put the graphite oxide powder prepared in step 1 into a glass vial, place it in a microwave oven, and microwave at 1000W for 35s to obtain MRGO;

[0021] 3) Put 16mg of MRGO and 25mg of ferrocene together into an agate mortar and grind for 15min. After mixing evenly, transfer the uniformly mixed black powder into a glass vial and microwave at 1000W for 29s to obtain a Gr / CNTs composite with uniform shape. ...

Embodiment 3

[0023] 1) Add 3.2g of graphite into a beaker containing 114mL of concentrated sulfuric acid at room temperature, then slowly add 16g of potassium permanganate in an ice bath, then transfer the reaction solution to a water bath at 31°C and stir for 42min to react. Add 340mL of ice water after the end to dilute, add dropwise a mass fraction of 17.3% H 2 o 2 solution until no bubbles are generated. Perform suction filtration and rinse the obtained golden yellow filter cake with a large amount of water, and dry the obtained powder in a vacuum oven at 42°C overnight;

[0024] 2) Put the graphite oxide powder prepared in step 1 into a glass vial, place it in a microwave oven, and microwave at 1000W for 38s to obtain MRGO;

[0025] 3) Put 15mg of MRGO and 26mg of ferrocene together into an agate mortar and grind for 15min. After mixing evenly, transfer the uniformly mixed black powder into a glass vial and microwave at 1000W for 39s to obtain a Gr / CNTs composite with uniform shape....

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Abstract

The invention relates to a method for preparing a graphene / carbon nanotube composite material by an intensive microwave process. The method is based on a microwave irradiation process, and comprises the following steps: putting graphite oxide into a microwave oven, and carrying out microwave irradiation for 2-5 minutes to obtain the reduced and stripped graphite oxide; and mixing the reduced and stripped graphite oxide with ferrocene, and carrying out secondary microwave treatment under identical conditions, thereby finally obtaining the graphene / carbon nanotube composite material. The method has the advantages of simple technique and low cost. The produced Gr / CNTs (carbon nanotubes) composite material has favorable electric conductivity and magnetism.

Description

technical field [0001] The invention relates to a nano-carbon composite material, in particular to a method for preparing a graphene carbon nanotube composite material by a powerful microwave method. Background technique [0002] As a new type of energy storage device, electrochemical capacitor is another energy storage device with great application potential and development value after lithium-ion batteries due to its fast charge and discharge rate, high power density, and long cycle life. However, low energy density is a key factor restricting the development and application of supercapacitors, and exploring how to increase the energy density of supercapacitors is the focus of current research in this field. According to the calculation formula of energy density, improving energy density mainly starts from two aspects. On the one hand, the voltage window of electrochemical capacitors is increased; [0003] As a two-dimensional monolayer material, graphene has a high speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/04
CPCC01P2004/64
Inventor 车春玲
Owner 临沂星火知识产权服务有限公司
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