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Preparation method and application of carbon fluoride material

A technology of fluorinated carbon and carbon materials, applied in the field of electrochemical energy storage of power supply technology, to achieve the effect of high specific power and high specific energy

Active Publication Date: 2020-05-19
XIAMEN INST OF RARE EARTH MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are difficult to achieve the optimal specific capacity and rate performance of carbon fluoride materials at the same time. How to achieve high specific energy properties while obtaining high specific power performance puts forward requirements for the structural design of carbon fluoride materials.

Method used

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  • Preparation method and application of carbon fluoride material
  • Preparation method and application of carbon fluoride material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A preparation method of carbon fluoride material, comprising the steps of:

[0023] Step 1: According to the mass ratio of soft carbon raw material non-graphitized mesocarbon microspheres and graphene materials as 98%: 2%, mix non-graphitized mesocarbon microspheres and graphene materials in methyl methacrylate , stirred evenly, and then sintered in a protective atmosphere at 900 °C for 12 hours to obtain a pretreated material.

[0024] Step 2: Grinding the pretreated product obtained in step 1 until the particle size reaches below 60 microns, passing through 200 mesh, 400 mesh, and 800 mesh sieve successively to obtain a powdery product.

[0025] Step 3: Put the powder material obtained in Step 2 into the fluorination equipment, pass in the fluorination gas NF3, keep the pressure at 120KPa, and react at 450°C for 12 hours to obtain a graphene carbon in the bulk phase with a fluorocarbon ratio of 0.8 Fluorinated carbon material.

[0026] The fluorinated carbon materia...

Embodiment 2

[0029] A preparation method of carbon fluoride material, comprising the steps of:

[0030] Step 1: According to the mass ratio of soft carbon raw material non-graphitized mesocarbon microspheres and graphene materials as 70%:30%, mix non-graphitized mesocarbon microspheres and graphene materials in methyl methacrylate , stirred evenly, and then sintered in a protective atmosphere at 300 °C for 24 hours to obtain a pretreated material.

[0031] Step 2: Grinding the pretreated product obtained in step 1 until the particle size reaches below 60 microns, passing through 200 mesh, 400 mesh, and 800 mesh sieve successively to obtain a powdery product.

[0032] Step 3: Put the powder material obtained in Step 2 into the fluorination equipment, pass in the fluorination gas NF3, keep the pressure at 90KPa, and react at 350°C for 24 hours to obtain a graphene carbon in the bulk phase with a fluorocarbon ratio of 0.7 Fluorinated carbon material.

[0033] The fluorinated carbon material...

Embodiment 3

[0035] A preparation method of carbon fluoride material, comprising the steps of:

[0036] Step 1: According to the mass ratio of soft carbon raw material non-graphitized mesocarbon microspheres and graphene materials as 85%:15%, mix non-graphitized mesocarbon microspheres and graphene materials in methyl methacrylate , stirred evenly, and then sintered in a protective atmosphere at 1500°C for 3 hours to obtain a pretreated material.

[0037] Step 2: Grinding the pretreated product obtained in step 1 until the particle size reaches below 60 microns, passing through 200 mesh, 400 mesh, and 800 mesh sieve successively to obtain a powdery product.

[0038] Step 3: Put the powder material obtained in Step 2 into the fluorination equipment, pass in the fluorination gas NF3, keep the pressure at 100KPa, and react at 400°C for 10 hours to obtain graphene carbon in the bulk phase with a fluorocarbon ratio of 0.75 Fluorinated carbon material.

[0039] The fluorinated carbon material ...

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Abstract

The invention discloses a preparation method of a carbon fluoride material, which comprises the following steps: S1, weighing 70-98 wt% of a soft carbon raw material and 2-30 wt% of a graphite carbonmaterial, mixing in a solvent, uniformly stirring, and sintering in a protective atmosphere at 300-1500 DEG C for 1-24 hours to obtain a pretreated material; S2, grinding the pretreated material obtained in the step S1 to prepare a powdery product; and S3, putting the powdery product obtained in the step S2 into fluorination equipment, introducing fluorination gas, keeping the pressure at 90-120 kPa, and reacting at 350-450 DEG C for 8-16 hours to obtain the carbon fluoride material. The carbon fluoride material prepared by the invention has high specific power and high specific energy, can realize discharge under the current of 10 A / g, has the specific energy of more than 850 Wh / kg and the specific power of more than 17000 W / kg, and can be applied to a positive electrode material of a lithium carbon fluoride battery.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage of power supply technology, and in particular relates to a preparation method and application of a carbon fluoride material. Background technique [0002] When carbon fluoride is used as a cathode material for lithium primary batteries, its theoretical mass specific energy is as high as 2180 Wh kg-1, which is currently the commercial lithium primary battery material with the highest theoretical specific energy. Lithium fluoride batteries are currently widely used in various civilian and military fields such as electronic radio frequency identification systems, cardiac pacemakers, missile ignition systems, small satellites or space weapons, kinetic energy interceptors, and space stations. The specific energy of fluorinated carbon materials is determined by the degree of fluorination of the material. The higher the degree of fluorination, the higher the theoretical specific energy, but ...

Claims

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Application Information

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IPC IPC(8): C01B32/10H01M4/583H01M4/587H01M4/62
CPCC01B32/10H01M4/5835H01M4/587H01M4/625Y02E60/10
Inventor 岳红军钟贵明陈慧鑫卢灿忠
Owner XIAMEN INST OF RARE EARTH MATERIALS
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