Technique for synthesizing graphite fluoride and carbon fluoride by using nitrogen trifluoride as fluridizer

A technology of ink, carbon fluoride, and nitrogen trifluoride, which is applied in the field of synthetic fluorinated graphite and carbon fluoride, can solve the problems of high product cost, poor safety, and short service life of equipment, and achieve low production cost and high safety. High efficiency and long service life of the equipment

Inactive Publication Date: 2007-02-21
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide a process for synthesizing fluorinated graphite and fluorinated carbon by using nitrogen trifluor

Method used

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  • Technique for synthesizing graphite fluoride and carbon fluoride by using nitrogen trifluoride as fluridizer
  • Technique for synthesizing graphite fluoride and carbon fluoride by using nitrogen trifluoride as fluridizer
  • Technique for synthesizing graphite fluoride and carbon fluoride by using nitrogen trifluoride as fluridizer

Examples

Experimental program
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Effect test

Embodiment 1

[0076] Put the dried graphite powder into the reactor, pass pure NF 3 Gas, the pressure reaches 150KPa. Raise the temperature, maintain the reaction temperature at 450° C., and react for 30 hours. The product was taken out after cooling, the fluorocarbon ratio of the product was 0.48, and the yield was 92%. The infrared absorption spectrum and elemental analysis EDS spectrum of the product are as follows figure 2 and image 3 shown.

Embodiment 2

[0078] Put the dried graphite powder into the reactor, pass pure NF 3 Gas, the pressure reaches 150KPa. Raise the temperature, maintain the reaction temperature at 540°C, and react for 15 hours. The product was taken out after cooling, the fluorocarbon ratio of the product was 0.95, and the yield was 87%. The infrared absorption spectrum and elemental analysis EDS spectrum of the product are as follows Figure 4 and Figure 5 shown.

Embodiment 3

[0080] Put the dried graphite powder into the reactor, pass pure NF 3 Gas, the pressure reaches 100KPa. Raise the temperature, maintain the reaction temperature at 640°C, and react for 4 hours. The product was taken out after cooling, the fluorocarbon ratio of the product was 1.12, and the yield was 55%. The infrared absorption spectrum and elemental analysis EDS spectrum of the product are as follows Figure 6 and Figure 7 shown.

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Abstract

This invention discloses a method for synthesizing graphite fluoride and carbon fluoride by using NF3 as the fluorinating agent. The method comprises: (1) filling the solid raw materials into a reactor, and evacuating the reaction system; (2) pumping NF3in the reactor; (3) heating the reactor, and keeping the reaction temperature; (4) opening the gas circulating pump to maintain the gas flow; (5) reacting for 4-30 h, and stopping heating; (6) cooling to norma ltemperature, opening the reactor, and taking out graphite fluoride or carbon fluoride. The method uses NF3 as the fluorinating agent to synthesize graphite fluoride and carbon fluoride, thus solves the problems of low process safety, short equipment service life and high produc tcost, and has such advantages as high safety, long equipment service life, no explosion.

Description

technical field [0001] The invention relates to a process for synthesizing graphite fluoride and carbon fluoride. Background technique [0002] Graphite fluoride is a kind of solid material with high chemical stability and heat resistance, and its chemical formula can be expressed as (CF x ) n , where 0<x<1.2. Graphite fluoride is mainly used as a solid lubricant and a positive electrode material for primary lithium batteries, and its industrial production technology is only mastered by a few countries such as the United States and Japan. There are mainly two types of existing synthetic technology routes: [0003] (1) Synthesis by high temperature method [0004] When the temperature is higher than 380 °C, graphite can be combined with F 2 The reaction produces graphite fluoride, which can be expressed as formula 1, and the higher the temperature, the greater the fluorine content of the product, and a product with a fluorine-to-carbon ratio close to 1 can be obtai...

Claims

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Application Information

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IPC IPC(8): C01B9/08C01B31/00
Inventor 刘志超党海军李辉陈广宇曾斌刘文元
Owner NORTHWEST INST OF NUCLEAR TECH
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