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A kind of activated carbon/carbon nanotube/graphene composite material and its preparation method and application

A technology of carbon nanotubes and composite materials, which is applied in the field of activated carbon/carbon nanotubes/graphene composite materials and its preparation, can solve the problems of easy aggregation of graphene sheets and difficulty in exerting capacitance performance, and achieve excellent electrochemical performance and plasticity Strong, stable performance

Active Publication Date: 2019-10-15
江苏宝烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large specific surface area of ​​graphene and the van der Waals force of graphene sheets, graphene sheets are easy to agglomerate during the preparation process, making it difficult to exert their capacitive properties.

Method used

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  • A kind of activated carbon/carbon nanotube/graphene composite material and its preparation method and application
  • A kind of activated carbon/carbon nanotube/graphene composite material and its preparation method and application
  • A kind of activated carbon/carbon nanotube/graphene composite material and its preparation method and application

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Embodiment 1

[0041] Embodiment 1 A kind of activated carbon / carbon nanotube / graphene composite material and its preparation method for lithium ion

[0042] Include the following steps:

[0043] S1. Pulping: uniformly disperse graphene oxide in deionized water, ultrasonically exfoliate graphene oxide into layers, and prepare a uniform dispersion of 2 mg / ml; uniformly disperse carbon nanotubes in deionized water, add 1% Surfactant polyvinylpyrrolidone K30 (PVP-K30), configured into a uniformly dispersed suspension of 2mg / ml, ultrasonically dispersed;

[0044] S2. Mixing: Take 85ml of graphene oxide slurry, 5ml of carbon nanotubes, and 20mg of activated carbon according to a certain ratio of the above two slurries, mix (AC:CNTs:GO=10:5:85), and make carbon nanotubes Conductive agent, support barrier agent, ultrasonic to make the mix homogeneous. Preparation of activated carbon / carbon nanotube / graphene composites;

[0045] S3 Vacuum filtration: Use Whatman PC filter membrane with a diameter...

Embodiment 2

[0050] Example 2 A kind of activated carbon / carbon nanotube / graphene composite material for lithium ion and its preparation method

[0051] Include the following steps:

[0052] S1. Pulping: uniformly disperse graphene oxide in deionized water, ultrasonically exfoliate graphene oxide into layers, and prepare a uniform dispersion of 2 mg / ml; uniformly disperse carbon nanotubes in deionized water, add 1% Surfactant polyvinylpyrrolidone K30 (PVP-K30), configured into a uniformly dispersed suspension of 2mg / ml, ultrasonically dispersed;

[0053] S2. Mixing: Take 85ml of graphene oxide slurry, 5ml of carbon nanotubes, and 40mg of activated carbon according to a certain ratio of the above two slurries, mix (AC:CNTs:GO=20:5:75), and make carbon nanotubes Conductive agent, support barrier agent, ultrasonic to make the mix homogeneous. Preparation of activated carbon / carbon nanotube / graphene composites;

[0054] S3 Vacuum filtration: Use Whatman PC filter membrane with a diameter of...

Embodiment 3

[0059] Example 3 A kind of activated carbon / carbon nanotube / graphene composite material for lithium ion and its preparation method

[0060] Include the following steps:

[0061] S1. Pulping: uniformly disperse graphene oxide in deionized water, ultrasonically exfoliate graphene oxide into layers, and prepare a uniform dispersion of 2 mg / ml; uniformly disperse carbon nanotubes in deionized water, add 1% Surfactant polyvinylpyrrolidone K30 (PVP-K30), configured into a uniformly dispersed suspension of 2mg / ml, ultrasonically dispersed;

[0062] S2. Mixing: Take 85ml of graphene oxide slurry, 5ml of carbon nanotubes, and 60mg of activated carbon according to a certain ratio of the above two slurries, mix (AC:CNTs:GO=30:5:65), and make carbon nanotubes Conductive agent, support barrier agent, ultrasonic to make the mix homogeneous. Preparation of activated carbon / carbon nanotube / graphene composites;

[0063] S3 Vacuum filtration: Use Whatman PC filter membrane with a diameter of...

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Abstract

The invention relates to the technical field of preparation of composite new materials and in particular to an activated carbon / carbon nanotube / graphene composite material and a preparation method and application thereof. A three-dimensional composite material is prepared from activated carbon, carbon nanotube and graphene. The large specific surface area and the high conductivity of the grapheme and the carbon nanotube are fully utilized. Further, activated carbon barrier carbon nanotube and graphene reunion and stacking are introduced. Thus, the zero-dimensional granular activated carbon, the one-dimensional carbon nanotube and the two-dimensional graphene are uniformly combined through vacuum filtration so as to form a flexible, self-supporting, and three-dimensional porous composite material. When used as a material of a lithium ion capacitor electrode, the composite material is not required to be filled with a conductive agent or a binder, and has the characteristics of self-supporting and flexibility without need for a current collector. The composite material helps to improve the energy density of lithium-ion capacitors and broadens the application field thereof.

Description

[0001] The invention relates to the technical field of composite new material preparation, in particular to an activated carbon / carbon nanotube / graphene composite material and its preparation method and application. Background technique [0002] Supercapacitor (Supercapacitor), also known as Electrochemical Capacitor (Electrochemical Capacitor), is a green and environmentally friendly energy storage device. Compared with secondary batteries, it has higher power density, short charge and discharge time, and long cycle life; Traditional capacitors have higher capacitance and energy density, and can be used normally in a wider temperature range. [0003] According to the energy storage mechanism, supercapacitors are divided into electric double layer capacitors, Faraday pseudocapacitors and hybrid supercapacitors. The energy storage process of the electric double layer supercapacitor is mainly electrostatic adsorption, and the charge is stored in the electric double layer at the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/06H01G11/24H01G11/34H01G11/36H01G11/50H01G11/86
Inventor 李星唐姚王明珊许浩陈杨阳杨华刘鑫慧李佩白永顺张康家王志强
Owner 江苏宝烯新材料科技有限公司