A kind of semi-interpenetrating network flame retardant gel electrolyte, lithium ion battery and preparation method
A gel electrolyte, semi-interpenetrating network technology, applied in the field of solid-state batteries, can solve the problems of reduced battery cycle performance, complex production process, complicated battery fabrication, etc., to improve safety performance, reduce leakage problems, and improve cycle performance. Effect
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Embodiment 1
[0036] Example 1 Preparation of semi-interpenetrating network flame retardant gel electrolyte
[0037]Fluorinated propylene carbonate, ethyl methyl carbonate, and diethyl carbonate in a volume ratio of 3:3:4, then add 1.4mol / L lithium hexafluorophosphate, 0.07mol / L lithium difluorooxalate borate, mix well, and then add the above solution 10% by mass content of low molecular weight polyfluoropropylene carbonate to obtain the basic electrolyte. Add mass content 0.5% pentaerythritol tetraacrylate and mass content 5% 3-(methacryloyloxy)propyltrimethoxysilane in basic electrolyte, then add 3-(methacryloyloxy)propyltrimethoxysilane and Azobisisobutyronitrile with a pentaerythritol tetraacrylate mass content of 1.5‰ was stirred evenly to obtain gel electrolyte 1. Use a high-temperature flamethrower to point the gel electrolyte for 1 time and 3 seconds, and observe the extinguishing time; apply the gel electrolyte on the PET diaphragm, heat and cure it at 60 degrees, and then use the...
Embodiment 2
[0038] Example 2 Preparation of Semi-Interpenetrating Network Flame Retardant Gel Electrolyte
[0039] Fluorinated propylene carbonate, ethyl methyl carbonate, and diethyl carbonate in a volume ratio of 3:3:4, then add 1.4mol / L lithium hexafluorophosphate, 0.07mol / L lithium difluorooxalate borate, mix well, and then add the above solution 10% acrylamide and azobisisobutyronitrile with a mass content of 1.5‰ of acrylamide are polymerized at 60°C for 1 hour to obtain a basic electrolyte. Add mass content 0.5% pentaerythritol tetraacrylate, mass content 3.75% 3-(methacryloyloxy)propyltrimethoxysilane and mass content 1.25% acrylamide, then add 3-(methacryloyloxy) Propyltrimethoxysilane and azobisisobutyronitrile with a mass content of 1.5‰ of pentaerythritol tetraacrylate were stirred evenly to obtain gel electrolyte 2. Use a high-temperature flamethrower to point the gel electrolyte for 1 time and 3 seconds, and observe the extinguishing time; apply the gel electrolyte on the P...
Embodiment 3
[0040] Example 3 Preparation of Semi-Interpenetrating Network Flame Retardant Gel Electrolyte
[0041] Fluorinated propylene carbonate, ethyl methyl carbonate, and diethyl carbonate in a volume ratio of 3:3:4, then add 1.4mol / L lithium hexafluorophosphate, 0.07mol / L lithium difluorooxalate borate, mix well, and then add the above solution 10% tetrahydrofuryl acrylate and azobisisobutyronitrile with a mass content of 1.5‰ tetrahydrofuryl acrylate are polymerized at 60°C for 1 hour to obtain a basic electrolyte. Add mass content 0.5% pentaerythritol tetraacrylate, mass content 3.75% 3-(methacryloyloxy)propyltrimethoxysilane and mass content 1.25% tetrahydrofuryl acrylate, then add 3-(methacryloyloxy ) propyltrimethoxysilane and azobisisobutyronitrile with a mass content of 1.5‰ of pentaerythritol tetraacrylate to obtain gel electrolyte 3. Use a high-temperature flamethrower to point the gel electrolyte for 1 time and 3 seconds, and observe the extinguishing time; apply the gel ...
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