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Preparation method of graphite fluoride micron sheet

A technology of fluorinated graphite and micron flakes, applied in fluorinated carbon, structural parts, electrical components, etc., can solve the problems of fast fluorination reaction rate and affecting material conductivity, etc., achieve good conductivity, improve conductivity, increase The effect of conductivity

Active Publication Date: 2021-04-20
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, carbon materials such as graphite or graphene are used as precursors through high-temperature fluorination, which can generate carbon-fluorine bonds (C-F bonds, C-F 2 bond, C-CF bond) to introduce fluorine atoms into carbon materials to obtain fluorinated graphene (ene) materials, but due to the fast fluorination reaction rate, a large number of fluorine atoms are combined on the surface of the material, which greatly affects the electrical conductivity of the material.

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  • Preparation method of graphite fluoride micron sheet
  • Preparation method of graphite fluoride micron sheet
  • Preparation method of graphite fluoride micron sheet

Examples

Experimental program
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Embodiment 1

[0038] In this embodiment, taking the preparation of a fluorinated graphite micro-sheet with a fluorocarbon ratio of 1.05 and a surface C=C bond ratio of 15% as an example, the preparation method provided in this embodiment is tested for the C =C bond ratio influence is verified as follows:

[0039] (1) Mix worm graphite with a particle size of 10 to 100 microns in deionized water at a ratio of 15%, and then emulsify the mixed solution at a speed of 3000 rpm for 60 minutes under high-speed shear, and then pass through a high-pressure homogenizer. The homogeneous solution was maintained at a pressure of 1500 Pascals for 60 minutes, filtered and vacuum-dried to obtain graphite micro-sheets;

[0040] (2) Selecting the Monel alloy balls with diameters of 5, 10, and 15 millimeters to assist high-temperature fluorination, the number ratio of balls with different diameters is 4:2:1, and combining the Monel alloy balls with different diameters in (1) The prepared fluorinated graphite...

Embodiment 2

[0045] In this embodiment, taking the preparation of a fluorinated graphite micro-sheet with a fluorine-carbon ratio of 1.07 and a surface C=C bond ratio of 7% as an example, the preparation method provided in this embodiment is tested on the surface C of the fluorinated graphite micro-sheet through specific tests. =C bond ratio influence is verified as follows:

[0046] (1) Mix worm graphite with a particle size of 10 to 100 microns in deionized water at a ratio of 15%, and then emulsify the mixed solution at a speed of 3000 rpm for 60 minutes under high-speed shear, and then pass through a high-pressure homogenizer. The homogeneous solution was maintained at a pressure of 1500 Pascals for 60 minutes, filtered and vacuum-dried to obtain graphite micro-sheets;

[0047] (2) Selecting the Monel alloy balls with diameters of 5, 10, and 15 millimeters to assist high-temperature fluorination, the number ratio of balls with different diameters is 4:2:1, and combining the Monel alloy...

Embodiment 3

[0052] In this embodiment, taking the preparation of a fluorinated graphite micro-sheet with a fluorine-carbon ratio of 1.04 and a surface C=C bond ratio of 10% as an example, the preparation method provided in this embodiment is tested on the surface C of the fluorinated graphite micro-sheet through specific tests. =C bond ratio influence is verified as follows:

[0053] (1) Mix worm graphite with a particle size of 10 to 100 microns in deionized water at a ratio of 15%, and then emulsify the mixed solution at a speed of 3000 rpm for 60 minutes under high-speed shear, and then pass through a high-pressure homogenizer. The homogeneous solution was maintained at a pressure of 1500 Pascals for 60 minutes, filtered and vacuum-dried to obtain graphite micro-sheets;

[0054] (2) Selecting the Monel alloy balls with diameters of 5, 10, and 15 millimeters to assist high-temperature fluorination, the number ratio of balls with different diameters is 4:2:1, and combining the Monel allo...

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Abstract

The embodiment of the invention provides a preparation method of a graphite fluoride micro-sheet, which comprises the following steps: shearing, emulsifying and homogenizing vermicular graphite, and carrying out alloy ball-assisted high-temperature fluorination to obtain the graphite fluoride micro-sheet with high fluorocarbon ratio and high conductivity. The proportion of C=C bonds on the surface of the graphite fluoride micro-sheet is 5-15%. Therefore, on the basis of ensuring a high fluorocarbon ratio, the C=C bond on the surface of the material is reserved, so that the conductivity of the material is remarkably improved, and the conductivity of the material is improved.

Description

technical field [0001] The invention relates to the field of fluorinated carbon materials, in particular to a preparation method of fluorinated graphite micro-sheets. Background technique [0002] Fluorinated carbon materials (CF x ) is currently the solid cathode material for lithium primary batteries (lithium / carbon fluoride batteries) with the highest theoretical energy density in the world, and has broad application prospects in the fields of electronic devices, biomedicine, and equipment power supplies. Fluorinated carbon materials have different properties depending on the carbon source. Common fluorinated carbon materials include fluorinated carbon fiber and fluorinated graphite. With the vigorous development of nanomaterials, fluorinated carbon nanotubes and fluorinated graphene, which use nanocarbon materials such as carbon nanotubes and graphene as carbon sources, have also been developed and utilized one after another. [0003] At present, carbon materials such ...

Claims

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Application Information

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IPC IPC(8): C01B32/10H01M4/587
CPCY02E60/10
Inventor 潘俊安罗振亚谢淑红潘勇汪啸
Owner XIANGTAN UNIV