A kind of polymer solid electrolyte for lithium ion battery and preparation method thereof
A solid electrolyte and lithium-ion battery technology, applied in solid electrolyte, non-aqueous electrolyte, secondary battery, etc., can solve the problems of poor electrochemical stability, low ionic conductivity, and low electrochemical sub-window, and achieve electrochemical stability The effect of performance improvement
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Embodiment 1
[0018] In an inert gas atmosphere with a water content of less than 1 ppm and an oxygen content of less than 1 ppm, mix 1 g of tetrahydrofuran acrylate and 1.5 g of vinylene carbonate solution into an organic solution, and then add 0.5 g of lithium difluorooxalate borate to the solution successively and 0.0025 g of azobisisobutyronitrile, then the prepared solution was injected into 0.75 g of polypropylene non-woven support material, and then placed at 55° C. for heating for 24 hours to obtain a solid polymer electrolyte.
[0019] The above method prepares a solid electrolyte in which a copolymer formed by polymerizing a tetrahydrofuran acrylate monomer and a vinylene carbonate monomer is a polymer, the mass ratio of the copolymer to the electrolyte is 67%, and the tetrahydrofuran acrylate monomer and carbonic acid are The mass ratio of vinylidene ester monomer is 2:3. After testing, the room temperature ionic conductivity of the solid electrolyte is 1.3×10- 4 S / cm, the initi...
Embodiment 2
[0021] In an inert gas atmosphere with a water content of less than 1 ppm and an oxygen content of less than 1 ppm, mix 1 g of tetrahydrofuran acrylate monomer and 1.5 g of vinyl sulfite solution into an organic solution, and then add 0.3 g of diethyl ether into the solution successively. Lithium trifluoromethanesulfonimide and 0.004 g of azobisisobutyronitrile were injected into 0.6 g of plain fiber non-woven support material, and then heated at 60° C. for 12 hours to obtain solid-state polymerization. material electrolyte.
[0022] The above method prepares a solid electrolyte in which a copolymer formed by a tetrahydrofuran acrylate monomer and a vinyl ethylene sulfite monomer is a polymer, the mass ratio of the copolymer to the electrolyte is 74%, and the tetrahydrofuran acrylate monomer is The mass ratio of vinyl sulfite monomer is 2:3. After testing, the room temperature ionic conductivity of the solid electrolyte is 1.4×10- 4 S / cm, the initial decomposition voltage is...
Embodiment 3
[0024] In an inert gas atmosphere with a water content of less than 1 ppm and an oxygen content of less than 1 ppm, 1 g of polyethylene glycol tetrahydrofuran acrylate monomer (Mn (number average molecular mass) = 300) and 1.5 g of ethylene ethylene carbonate solution were mixed into an organic solution, and then successively added 0.625 g of lithium bistrifluoromethanesulfonimide and 0.002 g of azobisisobutyronitrile into the solution, and then poured the obtained solution into 0.625 g of plain fiber non-woven support material, It was then heated at 80° C. for 12 hours to obtain a solid polymer electrolyte.
[0025] The above method prepares a solid electrolyte in which a copolymer formed by polyethylene glycol tetrahydrofuran acrylate monomer and ethylene ethylene carbonate monomer is a polymer, and the mass ratio of the copolymer to the electrolyte is 62%. The mass ratio of alcohol tetrahydrofuran acrylate monomer and ethylene ethylene carbonate monomer is 2:3. After testin...
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