Preparation method for fluorinated carbon material

A technology of carbon materials and carbon fluoride, applied in the electrolysis process, electrolysis components, etc., can solve problems such as danger, harsh reaction conditions, and difficult storage and transportation of fluorine gas, so as to reduce preparation costs, improve product quality, and eliminate diaphragm pollution problem effect

Inactive Publication Date: 2015-10-28
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problems of harsh reaction conditions and difficult and dangerous storage and transportation of fluorine gas in the existing preparation methods of fluorinated carbon materials, and provides a preparation method of fluorinated carbon materials

Method used

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  • Preparation method for fluorinated carbon material
  • Preparation method for fluorinated carbon material
  • Preparation method for fluorinated carbon material

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specific Embodiment approach 1

[0024] Specific embodiment 1: The preparation method of the fluorinated carbon material of this embodiment is carried out according to the following steps;

[0025] 1. In a single-chamber electrolyzer, nickel, iron or nickel-titanium alloy is used as cathode, nickel or nickel alloy is used as anode, metal fluoride is used as supporting electrolyte, carbon material is used as raw material, and a hydrogen fluoride aqueous solution with a mass concentration of ≥90% As an electrolyte, put the metal fluoride and carbon material into the electrolyte, and perform electrolytic fluorination under the conditions of electrolyte temperature of -10~10℃ and voltage of 4~10V, electrolysis for 1~36h, fluorination reaction End;

[0026] 2. After the electrolytic fluorination reaction is over, cool the electrolytic cell to -20°C, and use a PTFE tube to introduce the electrolyte, metal fluoride and fluorinated carbon materials in the electrolytic cell into perfluoropolyethylene-propylene. In the pla...

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment is different from Embodiment 1 in that the carbon material described in step 1 is graphite powder, graphene, single-walled carbon nanotubes or multi-walled carbon nanotubes. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the single-chamber electrolytic cell described in step one is equipped with a stirring device, and the volume is 30-100 mL. Others are the same as the first or second embodiment.

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Abstract

The invention discloses a preparation method for a fluorinated carbon material, relates to an electrochemical preparation method for the fluorinated carbon material, and aims to solve the problems that the conventional preparation method for the fluorinated carbon material is severe in reaction condition as well as difficult and very dangerous in fluorine gas storage and conveying. The preparation method provided by the invention comprises the following steps: (1) in a single-chamber electrolytic cell, carrying out electrolysis for a certain period till the reaction is finished, wherein Ni, Fe, or a Ni-Ti alloy is adopted as a cathode, Ni or a Ni alloy is adopted as an anode, a metal fluoride is adopted as a supporting electrolyte, a carbon material is adopted as a raw material, and hydrogen fluoride is adopted as an electrolyte solution; (2) after the electrofluorination reaction is finished, cooling the electrolytic cell, leading the electrolyte solution, the metal fluoride and the carbon material subjected to the electrofluorination reaction into a plastic bottle, heating, cooling to recover hydrogen fluoride, carrying out washing to remove residual HF and metal fluoride, and carrying out vacuum drying to obtain the fluorinated carbon material. The preparation method has the advantage that fluorine gas is indirectly utilized, so that the extremely severe reaction conditions required by the utilization of fluorine gas are not needed, and the potential safety hazards during fluorine gas storage and conveying can be avoided.

Description

Technical field [0001] The invention relates to a preparation method of fluorinated carbon material. Background technique [0002] The fluorinated carbon material is a kind of interlayer compound of carbon material formed by the combination of carbon and fluorine. The interlayer is fluorine atoms, which is divided into covalent bond type interlayer compound and semi-ionic type interlayer compound. The molecular formula is represented by (CFx)n, and the value range of x is 0 <x <1.25. Currently, the molecular formula (CF) is known n , (C 2 F) n And (C 4 F) n The 3 compounds shown. Due to the special structure of the fluorocarbon material, it has the properties of extremely low surface energy, high electrical activity, and relatively low cross-sectional area for absorbing thermal neutrons, so the fluorocarbon material can be used in lubrication, degreasing, antifouling, Batteries and nuclear reactions are widely used. [0003] The synthesis method of fluorinated carbon mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/24
CPCC25B1/245
Inventor 刘波姜玉富由君李忠林祁亚楠
Owner HARBIN UNIV OF SCI & TECH
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