A kind of all-solid-state battery and preparation method thereof
A technology of all-solid-state batteries and solid-state electrolytes, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low electrolyte ionic conductivity and low battery power, and the method is simple, convenient, and easy to charge and discharge performance, power-enhancing effects
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[0035]In addition, the preparation method of the above-mentioned all-solid-state battery proposed by the present invention includes:
[0036] Step 1: Mix the positive electrode powder material, acetylene black, graphite, imide, and solid electrolyte powder, and prepare the positive electrode sheet through coating, rolling, and drying;
[0037] Step 2: Thermally evaporate the mixture of carbon powder and lithium phosphate powder on the surface of the positive electrode under nitrogen plasma conditions to deposit a layer of lithium carbon phosphorus oxygen nitrogen solid electrolyte on the surface of the positive electrode, the lithium carbon phosphorus oxygen nitrogen solid electrolyte The chemical formula is Li x C y PO 4-z N z , where x>3,0
[0038] Step 3: Thermally evaporate a layer of metal lithium film on the surface of the lithium carbon phosphorus oxygen nitrogen solid electrolyte to form an all-solid lithium battery.
[0039] Wherein, the lithium ca...
Embodiment 1
[0051] Commercial cathode powder materials such as Li 4 Ti 5 o 12 , acetylene black, graphite, imide (PAI), solid electrolyte powder (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 Mix at a mass ratio of 50:3:2:5:40, use N-methylpyrrolidone (NMP) as a solvent, stir to form a uniform positive electrode slurry with a solid content of 50%, and coat the slurry on a 10 μm thick aluminum foil After being rolled and cut, it was dried in a vacuum oven at 120°C for 12 hours to obtain a 30 μm thick positive electrode sheet.
[0052] in Li 4 Ti 5 o 12 A 2 micron thick lithium carbon phosphorus oxygen nitrogen solid electrolyte is deposited on the surface of the positive electrode. The deposition of lithium carbon phosphorus oxygen nitrogen solid electrolyte is a combination of thermal evaporation and nitrogen plasma technology, and the coating is deposited under vacuum conditions, and the vacuum degree can reach 10 -4 Pa, the working gas N is controlled by a mass flow controller 2 The flow r...
Embodiment 2
[0056] Commercial cathode powder materials such as LiFePO 4 , acetylene black, graphite, imide (PAI), solid electrolyte powder (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 Mix at a mass ratio of 50:3:2:5:40, use N-methylpyrrolidone (NMP) as a solvent, stir to form a uniform positive electrode slurry with a solid content of 50%, and coat the slurry on a 10 μm thick aluminum foil After being rolled and cut, it was dried in a vacuum oven at 120 °C for 12 h to obtain a 4 μm thick positive electrode sheet.
[0057] In LiFePO 4 A 2 micron thick lithium carbon phosphorus oxygen nitrogen solid electrolyte is deposited on the surface of the positive electrode. in Li 4 Ti 5 o 12 A 2 micron thick lithium carbon phosphorus oxygen nitrogen solid electrolyte is deposited on the surface of the positive electrode. The deposition of lithium carbon phosphorus oxygen nitrogen solid electrolyte is a combination of thermal evaporation and nitrogen plasma technology, and the coating is deposited under...
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