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Carbon nanotube/graphene/activated carbon composite electrode material and preparation method and application thereof

A technology of carbon nanotubes and composite electrodes, which is applied in the field of electrochemical material preparation, can solve problems such as unfavorable large-scale industrial production, large material structure damage, and harmful chemical reagents to the environment, achieving high rate performance, high specific capacity, Effect of improving electrical conductivity

Active Publication Date: 2020-02-14
威海三合永新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the related reports that have been seen, at least two steps are used to obtain graphene / activated carbon composite materials. The process also causes great damage to the structure of the material itself, and the yield of the activated electrode material is low, which is not conducive to large-scale industrial production

Method used

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  • Carbon nanotube/graphene/activated carbon composite electrode material and preparation method and application thereof
  • Carbon nanotube/graphene/activated carbon composite electrode material and preparation method and application thereof
  • Carbon nanotube/graphene/activated carbon composite electrode material and preparation method and application thereof

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Embodiment 1

[0054] A preparation method of carbon nanotube / graphene / activated carbon composite electrode material, it comprises the following steps:

[0055] (1) Graphene oxide, activated carbon, and carbon nanotubes are mixed evenly by mechanical stirring according to a certain mass ratio, and the mass of graphene oxide accounts for 5%, the mass of activated carbon accounts for 90%, and the mass of carbon nanotubes accounts for 5%;

[0056] (2) the mixture obtained by step (1) is added to the mixture of polyvinyl alcohol (PVA), sodium carboxymethylcellulose (CMC) and sodium dodecylbenzenesulfonate (SDBS) with a mass fraction of 0.1%. In the solution, use an ultrasonic cleaning machine to mix evenly;

[0057] (3) Transfer the mixed solution obtained in step (2) to an airtight reactor, add hydrazine hydrate and stir evenly to carry out the reduction reaction, the mass ratio of graphene oxide to hydrazine hydrate is 1:1, and stir at high speed in the reactor during the reaction The time is...

Embodiment 2

[0060] A preparation method of carbon nanotube / graphene / activated carbon composite electrode material, it comprises the following steps:

[0061] (1) Graphene oxide, activated carbon, and carbon nanotubes are mixed evenly by a ball mill according to a certain mass ratio, and the mass of graphene oxide accounts for 20%, the mass of activated carbon accounts for 70%, and the mass of carbon nanotubes accounts for 10%;

[0062] (2) the mixture obtained by step (1) is added to the mixture of polyvinyl alcohol (PVA), sodium carboxymethylcellulose (CMC) and sodium dodecylbenzene sulfonate (SDBS) with a mass fraction of 1%. In the solution, use an ultrasonic breaker to mix evenly;

[0063] (3) The mixed solution obtained in step (2) is transferred to the airtight reactor, and sodium borohydride is added to stir evenly to carry out the reduction reaction. The mass ratio of graphene oxide and sodium borohydride is 1:3. The high-speed stirring time is 30h, and the liquid temperature in ...

Embodiment 3

[0066] A preparation method of carbon nanotube / graphene / activated carbon composite electrode material, it comprises the following steps:

[0067] (1) Graphene oxide, activated carbon, and carbon nanotubes are mixed uniformly by mechanical stirring according to a certain mass ratio, and the mass of graphene oxide accounts for 42%, the mass of activated carbon accounts for 50%, and the mass of carbon nanotubes accounts for 8%;

[0068] (2) the mixture that step (1) obtains is added to the mixing of polyvinyl alcohol (PVA), sodium carboxymethylcellulose (CMC) and sodium dodecylbenzenesulfonate (SDBS) that the mass fraction is 3%. In the solution, use an ultrasonic breaker to mix evenly;

[0069] (3) The mixed solution obtained in step (2) is transferred to the airtight reactor, and sodium citrate is added to stir evenly to carry out the reduction reaction. The mass ratio of graphene oxide and sodium citrate is 1:5. The high-speed stirring time is 24 hours, and the liquid tempera...

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Abstract

The invention relates to a carbon nanotube / graphene / activated carbon composite electrode material and a preparation method and application thereof. The carbon nanotube / graphene / activated carbon composite electrode material is prepared by the steps of adding activated carbon, carbon nanotubes and graphene oxide into a dispersant aqueous solution, uniformly mixing, adding the mixed solution into a reactor, stirring, carrying out a co-reduction reaction under the conditions of a reducing agent and a certain temperature, and finally filtering, cleaning and drying the obtained reaction product to obtain the high-performance carbon nanotube / graphene / activated carbon ternary composite electrode material. The carbon nanotube / graphene / activated carbon composite electrode material has a hierarchicalthree-dimensional porous structure, a high specific surface area and excellent conductivity, overcomes the defect of single pore structure of the activated carbon, enables the activated carbon to still have high specific capacity and high rate performance in an organic electrolyte, can be used as an electrode material of a supercapacitor, and is widely applied to the field of electrochemical material preparation.

Description

technical field [0001] The invention relates to the field of preparation of electrochemical materials, in particular to a carbon nanotube / graphene / activated carbon composite electrode material and its preparation method and application. Background technique [0002] Supercapacitors have the advantages of high power density, long charge-discharge cycle life, wide operating temperature range, green and pollution-free, etc. Compared with other existing energy storage technologies, they have tens of thousands of charge-discharge cycle life and high-current charge-discharge characteristics. Supercapacitors are widely used in consumer electronics, smart watches, smart grids, new energy vehicles, and aerospace. [0003] The electrode material of supercapacitors is a key factor affecting the performance and production cost of supercapacitors. At present, the electrode materials of supercapacitors mainly include carbon materials with capacitive properties, metal oxides with pseudoca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/34H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/34H01G11/36H01G11/86Y02E60/13
Inventor 元金石秦禄昌张元赛刘冬冬
Owner 威海三合永新能源科技有限公司
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