A kind of preparation method of gel polymer electrolyte and lithium ion battery
A gel polymer, polymer technology, applied in the field of lithium-ion batteries, can solve the problems of low conductivity, low battery performance, low liquid absorption rate, etc., achieve good compatibility, good application potential, and improve liquid absorption rate effect
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[0033]The preparation method of gel polymer electrolyte of the present invention is as follows:
[0034] S1. Add 5-70 parts by mass of polycarbonate monomer and 0.5-6 parts by mass of carboxyl or hydroxyl polycarbonate monomer into the reactor for polymerization reaction, and obtain polymer A after purification;
[0035] The polycarbonate monomer can be one or more of diphenolic propane and trimethylene carbonate, and the carboxyl or hydroxyl polycarbonate monomer can be 2,2-bis(4-hydroxyphenyl)propionic acid, 5-methyl-2-oxo-1,3-dioxane-5-carboxylic acid, 5-hydroxy-1,3-dioxan-2-one, 5-ethyl-5-(hydroxymethyl )-1,3-dioxan-2-one or several; polycarbonate monomers and carboxyl- or hydroxyl-containing polycarbonate monomers can be produced by phosgene method, transesterification method or thermocatalytic method Carry out the polymerization reaction, the polymer A that obtains is a kind of carboxyl or carboxyl polycarbonate polymer, wherein a kind of polymer has polycarbonate struc...
Embodiment 1
[0045] S1. Add 5 parts by mass of trimethylene carbonate and 0.5 parts by mass of 5-methyl-2-oxo-1,3-dioxane-5-carboxylic acid into the reactor, and perform polymerization by thermal catalytic polymerization , continue to feed nitrogen into the reactor and continue to stir at a rotating speed of 200r / min, then add 30 parts by mass of toluene (solvent), 0.01 parts by mass of stannous isooctanoate (catalyst), and react at 100°C for 60min to obtain Polymer A ; The catalyst used in this step can also be tributyltin oxide or tin acetate or rare earth or biological enzyme except that it can be stannous isooctanoate;
[0046] S2, 20 parts by mass of polyethylene glycol methyl ether methacrylate (molecular weight 300), 60 parts by mass of methyl methacrylate, 2 parts by mass of acrylic acid, 0.5 parts by mass of polyethylene glycol methacrylate (molecular weight 2500) Add 300 parts by mass of toluene, continue to blow nitrogen, stir at a speed of 500r / min, and then add 0.5 parts by ma...
Embodiment 2
[0055] S1. Add 70 parts by mass of trimethylene carbonate and 6 parts by mass of 5-hydroxy-1,3-dioxan-2-one into the reactor for thermocatalytic polymerization reaction, and continue to pass nitrogen into the reactor and continue to Stir at a speed of 800r / min, then add 60 parts by mass of toluene and 0.9 parts by mass of tributyltin oxide, and react at 100°C for 80 minutes to obtain polymer A;
[0056] S2, 5 parts by mass of polyethylene glycol methyl ether methacrylate (molecular weight 20000), 5 parts by mass of acrylonitrile, 5 parts by mass of polyethylene glycol methyl methacrylate (molecular weight 300), 10 parts by mass of polyethylene oxide (molecular weight 10,000,000) add in 200 mass parts tetrahydrofuran, continue logical nitrogen, stir with the rotating speed of 800r / min, then add 0.05 mass parts benzoyl peroxide tert-butyl peroxide, then add and mix 5 mass parts nano silicon dioxide ( Toluene with a particle size of 700nm) was mixed evenly, and the temperature wa...
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