Modified perfluorocarbon battery and methods for preparing positive electrode pieces and positive electrode materials for modified perfluorocarbon battery
A technology of permanent fluorinated carbon and positive electrode materials, applied in the field of preparation of modified carbon fluorinated batteries and their positive electrode sheets and positive electrode materials, can solve large energy loss, large discharge/charge potential difference, poor cycle stability, etc. problems, to achieve the effect of improved reactivity, simple modification method and low cost
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[0022] The present invention provides a method for preparing a modified carbon fluoride cathode material, which comprises the following steps: first disperse the carbon fluoride material in a solvent to form a dispersion liquid; then heat the dispersion liquid and keep it heated for a period of time to react, Stirring is kept during this process; after the heating reaction is completed, the modified carbon fluoride cathode material is prepared after the solvent is evaporated and ultrasonicated, dried.
[0023] Preferably, the fluorinated carbon material is one or more of fluorinated graphite, fluorinated carbon fiber, fluorinated carbon nanodisc, fluorinated coke or fluorinated mesophase carbon ball; the fluorinated carbon material The fluorocarbon molar ratio is 0.33 to 1.2.
[0024] Preferably, the solvent is one or more of N-methylpyrrolidone, isopropanol, acetone or N,N-dimethylformamide.
[0025] Preferably, the concentration of the fluorocarbon material in the dispersion is 0....
Example Embodiment
[0039] Example 1
[0040] Preparation of modified carbon fluoride cathode material: Weigh 300 mg of fluorinated mesophase carbon microspheres (molar ratio of fluorocarbon to 0.86), disperse in 200 ml of isopropanol, and stir to form a uniform solution. React at 60°C for 10 hours. After cooling down to room temperature, ultrasonicate for 1.5 hours and dry at 80°C for 12 hours.
[0041] Preparation of modified carbon fluoride positive pole piece: Take 12.5mg of polyvinylidene fluoride (PVDF), dissolve it in 1.5ml of N-methylpyrrolidone (NMP), stir to form a uniform solution, and add 100mg of modified carbon fluoride intermediate phase in turn Carbon microspheres, 12.5mg superconducting carbon black conductive agent, stirred for 8 hours to prepare modified fluorocarbon positive electrode slurry, coated on ordinary aluminum foil, and dried at 100°C.
[0042] Preparation of modified carbon fluoride battery: The prepared modified carbon fluoride positive electrode was punched into circula...
Example Embodiment
[0043] Example 2
[0044] Preparation of modified carbon fluoride cathode material: Weigh 200 mg of graphite fluoride (the molar ratio of fluorocarbon to 0.7), disperse it in 400 ml of N-methylpyrrolidone (NMP), and stir to form a uniform solution. React at 90°C for 10 hours. After cooling down to room temperature, ultrasonicate for 2 hours and dry at 100°C for 20 hours. The microscopic morphology of the modified fluorocarbon material is as figure 2 with image 3 Shown.
[0045] Preparation of modified carbon fluoride positive pole piece: Take 15mg of polyvinylidene fluoride (PVDF), dissolve it in 2ml of N-methylpyrrolidone (NMP), stir to form a uniform solution, add 105mg of modified fluorinated graphite, 30mg of superconducting Carbon black conductive agent is stirred for 8 hours to prepare fluorocarbon positive electrode slurry, which is coated on the corroded aluminum foil and dried at 100°C.
[0046] Preparation of unmodified carbon fluoride positive pole piece: Take 15mg of ...
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