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Graphene composite material and preparation method thereof

A composite material and graphene technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of short life, inability to perform high current charge and discharge, low power density, etc., to achieve extended life, easy to control production conditions, The effect of reducing production costs

Inactive Publication Date: 2013-12-18
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The oxocarbon lithium salt material has the advantages of high specific capacity, high energy density, and good thermal stability, but there are two problems in this material, one is that the power density is not high, and it cannot be charged and discharged with a large current; cycle, the capacity decays quickly, and the life is shorter than that of current commercial lithium-ion batteries

Method used

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  • Graphene composite material and preparation method thereof
  • Graphene composite material and preparation method thereof
  • Graphene composite material and preparation method thereof

Examples

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preparation example Construction

[0022] The example of the present invention also provides a preparation method of the above-mentioned graphene composite material with simple process, high efficiency, and easy operation and control. The preparation method technological process of this graphene composite material please refer to figure 1 , the method includes the following steps:

[0023] S01, obtaining graphene and 1,6,7,12,13,18-hexaazatrirynylene;

[0024] S02, ball milling and mixing: the graphene in step S01 is ball milled and mixed with 1,6,7,12,13,18-hexaazatrinaphthylenene to obtain a graphene composite material, wherein graphene accounts for the graphene composite material 10% to 30% of the total mass.

[0025] Specifically, the graphene in the above step S01 can be prepared by itself or purchased from the market. It is preferably prepared as follows:

[0026] S011: Obtain graphene oxide;

[0027] S012: dehydrating the graphene oxide in step S011 to obtain dehydrated graphene oxide;

[0028] S01...

Embodiment 1

[0050] A kind of graphene composite material and preparation method thereof, the specific steps of its preparation method are as follows:

[0051] Preparation of S11, HATN:

[0052] Fully dissolve 0.01mol cyclohexanone and 0.03mol o-phenylenediamine in acetic acid, then reflux at 40°C for 3h, wash with water, and filter to obtain HATN.

[0053] S12, preparation of graphene composite material:

[0054] S121. Graphene: put graphite oxide into a muffle furnace, and reduce it at 800°C for 12 hours in a hydrogen atmosphere.

[0055] S122. Put the obtained graphene and HATN into a ball mill at a mass ratio of 1:9, and ball mill at a speed of 200 rpm for 5 hours to obtain a graphene composite material with a mass fraction of graphene of 10%. Wherein, the particle size of the graphene composite material is 25 μm.

Embodiment 2

[0057] A kind of graphene composite material and preparation method thereof, the specific steps of its preparation method are as follows:

[0058] Preparation of S21, HATN:

[0059] Fully dissolve 0.005mol cyclohexanone and 0.015mol o-phenylenediamine in tetrahydrofuran, then reflux at 60°C for 1 hour, wash with water, and filter to obtain HATN.

[0060] S22, preparation of graphene composite material:

[0061] S221. Graphene: put the obtained graphite oxide into a muffle furnace, and reduce it at a high temperature of 1200° C. for 1 hour under an atmosphere such as argon.

[0062] S222. Put the obtained graphene and HATN into a ball mill at a mass ratio of 3:7, and ball mill at a speed of 1000 rpm for 0.5 h to obtain a graphene composite material with a mass fraction of graphene of 30%. Wherein, the particle size of the graphene composite material is 50 μm.

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Abstract

The invention discloses a graphene composite material, and a preparation method and an application thereof as a positive electrode material. The graphene composite material is formed by compositing graphene with 1,6,7,12,13,18-hexaazatrinaphthylene, wherein the mass of graphene accounts for 10%-30% of the total mass of the graphene composite material. The preparation method of the graphene composite material comprises a graphene and 1,6,7,12,13,18-hexaazatrinaphthylene obtaining step and a ball milling and mixing step. The graphene composite material has higher capacity; and because 1,6,7,12,13,18-hexaazatrinaphthylene has a large molecular system, the graphene composite material is not easy to dissolve in an electrolyte solution in a process of charge and discharge, so as to increase the positive electrode life. The preparation method has the advantages of simple process and easily controlled production conditions, effectively reduces the production cost, improves the production efficiency, and is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a graphene composite material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004, and won the Nobel Prize in Physics in 2010, which once again sparked an upsurge in carbon material research. Due to its unique structure and photoelectric properties, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is as high as 2630m 2 / g, can be used in effect transistors, electrode materials, composite materials, liquid crystal display materials, sensors, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M10/0525
CPCY02E60/10
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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