Graphene-ionic liquid composite material and preparation method thereof

An ionic liquid and composite material technology, applied in the field of graphene-ionic liquid composite materials and their preparation, can solve the problems of reducing the performance of electrode materials, reducing the characteristics of graphene materials, etc.

Inactive Publication Date: 2011-08-03
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 disadvantage of this method is that it leads to the aggregation of graphene, which leads to the reduction of the characteristics of the graphene material, for example, reducing its performance as an electrode material.

Method used

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  • Graphene-ionic liquid composite material and preparation method thereof
  • Graphene-ionic liquid composite material and preparation method thereof
  • Graphene-ionic liquid composite material and preparation method thereof

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preparation example Construction

[0026] see figure 1 , showing the preparation method flow chart of the graphene-ionic liquid composite material of the embodiment of the present invention, the method includes the following steps:

[0027] S01, obtain graphene dispersion: provide graphene raw material, dissolve it in a solvent, and perform ultrasonic and heat treatment to obtain graphene dispersion;

[0028] S02, forming a mixed system of graphene, ionic liquid and solvent: in the graphene dispersion, add ionic liquid, and ultrasonically oscillate the ionic liquid at the same time to make it react with graphene to form a mixture of graphene, ionic liquid and solvent system, wherein the ionic liquid has a polar electron cloud structure, and the graphene is a graphene sheet structure;

[0029] S03, rotary evaporation solvent: rotary evaporation removes most of the solvent;

[0030] S04, filtering: filtering the evaporated mixed system to obtain a graphene-ionic liquid composite material, wherein the obtained com...

Embodiment 1

[0038] The preparation method of the graphene-ionic liquid composite material of present embodiment 1 specifically comprises the following steps:

[0039] (1) Obtaining a graphene dispersion: in 100 mL of phenylacetonitrile pentafluoride solvent, add 10 mg of natural graphite, ultrasonically, and heat to obtain a graphene dispersion.

[0040] In order to detect the existence of graphene after the reaction in step (1), the graphene obtained by the reaction can be used for scanning electron microscope observation. see figure 2 , shows the scanning electron micrograph of the graphene that step (1) obtains, as can be seen from the figure, graphene has formed wrinkled sheet-like material, illustrates the formation of graphene sheet-like material.

[0041] (2) Form a mixed system of graphene, ionic liquid and solvent: in the above dispersion, gradually add 10mL of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid as a cosolvent, and The ionic liquid was added dropwise, a...

Embodiment 2

[0045] The preparation method of the graphene-ionic liquid composite material of present embodiment 2 is basically the same as embodiment 1, and the difference is that the solvent in step (1) is replaced with nitropyridine and phenylamine mixed solution, in addition, the added natural stone Ink quality is 1mg, and other steps are basically the same as embodiment 1, finally obtains the composite material of muddy or pasty graphene-ionic liquid, and the removal time of ionic liquid is 12 hours in the present embodiment 2, and graphene accounts for now The mass fraction range is approximately 0.10-20%.

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Abstract

The invention provides a graphene-ionic liquid composite material and a preparation method thereof. The composite material comprises the following compositions in percentage by mass: 0.01-99.99% of graphene and 0.01-99.99% of ionic liquid, wherein the ionic liquid has a polar electron cloud structure, the graphene is in a graphene sheet structure, and the ionic liquid is doped in the graphene sheets through the polar electron cloud structure of the ionic liquid so a to form a graphene-ionic liquid composite structure. Because the polar electron cloud structure of the ionic liquid can damage the interaction force between the graphene sheets and reduce the gathering of the graphene, the obtained composite material has a high specific surface area and a large specific capacity, and can be suitable to be used as the electrode materials of batteries or capacitors, and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic-organic composite materials, and in particular relates to a conductive graphene-ionic liquid composite material and a preparation method thereof. Background technique [0002] With the increasing development of science and technology, people gradually turn from pure inorganic composite materials or organic composite materials to inorganic-organic composite materials, because they have the dual properties of inorganic materials and organic materials, and also have some unique composite structures. Much favored. [0003] For example, Andre K. Geim of the University of Manchester in the United Kingdom prepared graphene materials in 2004. Due to its unique structure and optoelectronic properties, it has attracted extensive attention. Single-layer graphite is considered as an ideal electrode material due to its large specific surface area, excellent electrical and thermal conductivity, and low ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/00C01B31/04H01B13/00H01G9/04
Inventor 周明杰王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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