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Few-layer graphite intercalation compound and preparation method thereof

A graphite interlayer and compound technology, which is applied to carbon compounds, chemical instruments and methods, graphite, etc., can solve the problems of high cost, high reaction temperature, and high processing cost, and achieve simple production equipment, high reaction temperature, and excellent preparation performance. Effect

Active Publication Date: 2017-07-28
孙旭阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. As mentioned above, in addition to graphene oxide GO, it is difficult to prepare few-layer graphite intercalation compounds (FLGICs) with properties similar to or even superior to graphene on a large scale
[0008] 2. Due to the poor quality of the graphite intercalation compound obtained by the existing preparation method of the graphite intercalation compound, the cost is high and the efficiency is low
It is mainly manifested in the incomplete intercalation of GICs, inhomogeneity, lamella rupture, and only powder can be obtained without film formation. Therefore, the quality of GICs precursors in the graphite intercalation compound mechanical exfoliation method restricts the production of few-layer graphite intercalation compound products. quality
At the same time, just as the graphite mechanical exfoliation method cannot prepare graphene on a large scale, the efficiency of the graphite intercalation compound mechanical exfoliation method is very low. Together with the low efficiency of the preparation of GICs precursors, the overall efficiency of the graphite intercalation compound mechanical exfoliation method is even lower.
In addition to the resulting extremely high unit cost, this method also cannot prepare few-layer graphitic intercalation compound films.
[0009] 3. Due to the high cost and low efficiency of the precursor graphene preparation of the gas-phase double-chamber method with high-quality graphene as the precursor and the intercalation, the superimposed gas-phase double-chamber method has high vacuum, complex reaction equipment, high reaction temperature, and long reaction time High cost and low efficiency factors, this method is more costly and less efficient
Many defects and pulverization, poor stability of the production process, uncertain product structure, use of strong acid and strong oxidant in the production process, large environmental pollution, high processing cost
This method also cannot prepare relatively more important metal and metal halide few-layer graphite intercalation compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Under the protection of nitrogen, in a relatively high temperature area, CuCl is contained in a nickel container 2 -AlCl 3 The mixed salt is used as the liquid bed molten state medium, in which CuCl 2 -AlCl 3 The mole fraction ratio is 1:1, heating and melting to 700°C and then continuously feeding acetylene gas, the acetylene carbon source is activated and cracked, and the cracked atomic carbon dissolves in the molten medium CuCl 2 -AlCl 3 In the mixed salt, the nickel container also plays a catalytic cracking and activation role; the above-mentioned molten CuCl with dissolved carbon is piped 2 -AlCl 3 The mixed salt is transported to the carbonaceous tank in the relatively low temperature area, and passes through the variable temperature area during transport, and the molten CuCl with carbon dissolved in the pipeline in the variable temperature area 2 -AlCl 3Cool the mixed salt to 160°C, and add [bmim]Cl at 200°C to form [bmim]Cl-AlCl 3 -CuCl 2 Ionic liquids, ...

Embodiment 2

[0030] Under the protection of nitrogen and argon gas, in a relatively high temperature zone, a tin-magnesium alloy is contained in a nickel container as a liquid bed molten state medium, in which the molar ratio of tin and magnesium is 8:2, heating and melting, heating to 900°C, and then continuously adding poly Styrene, polystyrene carbon sources are activated and cracked, and the atomic carbon after cracking is dissolved in the molten tin liquid medium, and the nickel container also plays a role in catalytic cracking and activation; It is transported to the stainless steel tank in the relatively low temperature zone, and passes through the variable temperature zone during transportation, and the molten tin-magnesium alloy solution with carbon dissolved in the pipeline in the variable temperature zone is cooled to 400°C to keep the carbon in an unsaturated precipitation state; in the relatively low temperature zone, the stainless steel tank The medium inside maintains a worki...

Embodiment 3

[0033] Under the protection of nitrogen and argon gas, in the relatively high temperature zone, the nickel container is filled with a molten medium as a liquid bed, in which the mass ratio of copper, nickel and tin is 3:3:4. After heating and melting, the temperature rises to 1000 ° C at the bottom Pass through the toluene liquid, the carbon source is activated and cracked, and the atomic carbon after cracking is dissolved in the molten medium copper-nickel-tin alloy, and the nickel container also plays a role in catalytic cracking and activation; the above-mentioned molten tin-indium alloy with carbon dissolved The medium is transported to the carbonaceous tank in the relatively low temperature area, and passes through the variable temperature area during transportation. In the variable temperature area, the molten copper-nickel-tin alloy medium with carbon dissolved in the pipeline cools down to 560°C to keep the carbon in an unsaturated precipitation state; in the relatively ...

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Abstract

A few-layer graphite intercalation compound is technically characterized in that the compound includes 2-10 graphite layers, and spacing between every two intercalations is filled with an insert. The liquid bed preparation method comprises: under protective gas, forming a liquid bed through a molten medium that is composed of one or more substances and heated to molten state; activating and splitting a carbon source at high temperature, dissolving atomic carbon formed by splitting into the molten medium, activating inserts at high temperature, and dissolving in the molten medium, or the molten medium comprises the insert; by means of promoting graphite intercalation compound reaction and solidification and crystallization, allowing carbon and the insert to be bonded during crystallizing, and precipitating few-layer graphite intercalation compound in super-matured mode in the molten medium state. The few-layer graphite interaction compound and its preparation method have the advantages that high-performance high-mass few-layer graphite intercalation compound, the cost is low, little pollution is caused, and the efficiency is high.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a few-layer graphite intercalation compound (FLGICs) and a preparation method thereof. Background technique [0002] Graphite Intercalation on Compounds (Graphite Intercalation on Compounds, referred to as GICs; also known as graphite intercalation compounds) is formed by the insertion of atomic molecules and particle groups into the interlayer. Graphite has a very good layered structure, and the carbon atoms in the layer are SP 2 The covalent bonds formed by the hybrid orbital electrons and the metal bonds formed by the 2Pz orbital electrons are connected to form a firm hexagonal network plane, and the carbon atoms have extremely strong bonding energy; while between the layers, there is a weak Van der Waals force Combine. The huge difference in bonding force between layers and interlayers and the weak interlayer bonding force lead to a variety of atoms, molecules, ions, and partic...

Claims

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Application Information

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IPC IPC(8): C01B32/205C01B32/22C01B32/15
CPCC01P2004/20C01P2004/80
Inventor 孙旭阳
Owner 孙旭阳
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