Preparation method of gel electrolyte and application thereof in field of lithium ion batteries
A gel electrolyte, ionic liquid technology, applied in the field of lithium-ion batteries and chemical power sources, can solve the problems of poor temperature tolerance, low safety performance, flammable and explosive safety performance, etc., and achieve high electrical conductivity, charge-discharge specific capacity, etc. high effect
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[0024] Example 1
[0025] This example is a specific example of preparing the gel electrolyte 1 using the above composition.
[0026] 0.5g of ionic liquid polymer—polypyrrolidine bistrifluoromethanesulfonimide and 0.02g of filler 1, dissolved in 8mL of solvent 1, and coated on a glass plate. After the solvent evaporates, it is dried in vacuum to obtain translucent porous The film is cut into discs with a diameter of 16 mm, which is the product A1. Among them, the inorganic filler 1 is SBA-15, and the solvent 1 is acetone; the vacuum drying temperature is 95°C.
[0027] In the glove box, dissolve 0.2 g of LiTFSI in the ionic liquid monomer—N-methyl-N-butylpyrrolidine bistrifluoromethanesulfonimide salt, and mix well to obtain the product B1. Among them, the preparation method of the ionic liquid monomer is as follows: 1-methylpyrrolidine 4g, bromobutane 6g, dissolved in acetonitrile, heated in an oil bath, and the reaction does not exceed 24h. After the completion of the reaction, ...
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[0029] Example 2
[0030] This example is a specific example of preparing the gel electrolyte 2 using the above composition.
[0031] 0.5g of ionic liquid polymer—polypyrrolidine bistrifluoromethanesulfonimide and 0.025g of filler 2, dissolved in 8mL of solvent 2, and coated on a glass plate. After the solvent evaporates, it is dried in vacuum to obtain translucent porous The film is cut into discs with a diameter of 16 mm, which is the product A2. Among them, the inorganic filler 2 is LiAlO 2 , Solvent 2 is N,N-dimethylformamide; the vacuum drying temperature is 100°C.
[0032] In the glove box, dissolve 0.19 g of LiFSI in the ionic liquid monomer—N-methyl-N-butylpyrrolidine bistrifluoromethanesulfonimide salt, and mix it evenly to obtain product B2. Among them, the preparation method of the ionic liquid monomer is: 5 g of 1-methylpyrrolidine and 8 g of bromobutane, dissolved in acetonitrile, heated in an oil bath, and the reaction does not exceed 24 hours. After the completion o...
Example Embodiment
[0034] Example 3
[0035] This example is a specific example of preparing the gel electrolyte 3 using the above composition.
[0036] 0.5g of ionic liquid polymer—polypyrrolidine bistrifluoromethanesulfonimide and 0.025g of filler 3, dissolved in 8mL of solvent 3, coated on a glass plate, vacuum dried after solvent volatilization, to obtain translucent porous The film is cut into discs with a diameter of 16 mm, which is the product A3. Among them, the inorganic filler 3 is Al 2 O 3 , Solvent 3 is methanol; the vacuum drying temperature is 120°C.
[0037] In the glove box, dissolve 0.1 g of LiFSI in the ionic liquid monomer—N-methyl-N-butylpyrrolidine bistrifluoromethanesulfonimide salt, and mix it evenly to obtain the product B3. Among them, the preparation method of the ionic liquid monomer is: 8 g of 1-methylpyrrolidine and 15 g of bromobutane, dissolved in acetonitrile, heated in an oil bath, and the reaction does not exceed 24 hours. After the completion of the reaction, the a...
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