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Activated carbon/carbon nanotube/graphene composite material and preparation method and application thereof

A technology of carbon nanotubes and composite materials, which is applied in the field of activated carbon/carbon nanotubes/graphene composite materials and preparation, can solve problems such as difficulty in exerting capacitance performance and easy agglomeration of graphene sheets, and achieve excellent electrochemical performance and improved Mass energy density, the effect of improving the utilization rate

Active Publication Date: 2017-11-07
江苏宝烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Activated carbon/carbon nanotube/graphene composite material and preparation method and application thereof
  • Activated carbon/carbon nanotube/graphene composite material and preparation method and application thereof
  • Activated carbon/carbon nanotube/graphene composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Example 1 Activated carbon / carbon nanotube / graphene composite material for lithium ion and preparation method thereof

[0042] It includes the following steps:

[0043] S1. Pulping: uniformly disperse graphene oxide in deionized water, ultrasonically peel it into layers of graphene oxide, and configure it into a uniform dispersion of 2mg / ml; evenly disperse carbon nanotubes in deionized water, add 1% The surface active agent polyvinylpyrrolidone K30 (PVP-K30) is configured into a uniformly dispersed suspension of 2mg / ml, and it is uniformly dispersed by ultrasound;

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

[0045] S3 Vacuum filtration: Us...

Embodiment 2

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

[0051] It includes the following steps:

[0052] S1. Pulping: uniformly disperse graphene oxide in deionized water, ultrasonically peel it into layers of graphene oxide, and configure it into a uniform dispersion of 2mg / ml; evenly disperse carbon nanotubes in deionized water, add 1% The surface active agent polyvinylpyrrolidone K30 (PVP-K30) is configured into a uniformly dispersed suspension of 2mg / ml, and it is uniformly dispersed by ultrasound;

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

[0054] S3 Vacuum filtration:...

Embodiment 3

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

[0060] It includes the following steps:

[0061] S1. Pulping: uniformly disperse graphene oxide in deionized water, ultrasonically peel it into layers of graphene oxide, and configure it into a uniform dispersion of 2mg / ml; evenly disperse carbon nanotubes in deionized water, add 1% The surface active agent polyvinylpyrrolidone K30 (PVP-K30) is configured into a uniformly dispersed suspension of 2mg / ml, and it is uniformly dispersed by ultrasound;

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

[0063] S3 Vacuum filtration: Use...

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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 a preparation method and application. Background technique [0002] Supercapacitor, also known as Electrochemical Capacitor, is a green and environmentally friendly energy storage device. Compared with secondary batteries, it has a higher power density, a short charge and discharge time, and a long cycle life; Traditional capacitors have higher capacitance and energy density, and can be used normally in a wider temperature range. [0003] Supercapacitors are classified into electric double layer capacitors, Faraday pseudocapacitors and hybrid supercapacitors according to the energy storage mechanism. The energy storage process of electric double-layer supercapacitors is mainly electrostatic adsorption, and the charge is stored in the electric double layer at the interface. Therefore, the electrode material of...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/24H01G11/34H01G11/36H01G11/50H01G11/86
Inventor 李星唐姚王明珊白永顺张康家王志强
Owner 江苏宝烯新材料科技有限公司
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