Nonaqueous electrolyte for high-voltage lithium ion battery
A lithium-ion battery, non-aqueous electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of reduced cycle performance, difficult to guarantee cycle performance, poor electrolyte compatibility, etc., to improve wettability, Improve the effect of normal temperature and high and low temperature cycle performance
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[0031] The electrolyte was prepared in a BRAUN glove box filled with nitrogen with a purity of 99.999%, the moisture in the glove box was controlled at ≤5ppm, and the temperature was at room temperature. Mix 30 grams of EC and 70 grams of EMC, mix well, seal, put it in the refrigerator and let it cool down to 8°C, transfer it to the glove box, and then add LiPF in two batches 6 Mix well to form a non-aqueous electrolyte for lithium ion batteries with a lithium salt molar concentration of 1 mol / L, add 3% FEC, 2% LIFSI, 3% propane sultone in the above non-aqueous electrolyte, 2% of 1,2,3-tricarbonitrile 1.5 is uniformly mixed to obtain a high-voltage lithium ion non-aqueous electrolyte.
[0032] The preparation methods of the following other examples and comparative examples are carried out with reference to the preparation method of Example 1.
[0033]Among them, FEC (CAS: 114435-02-8), 1,3,5 pentanetricarbonitrile (4379-04-8), 1,2,3 glycerol (62872-44-0), 1,3,6 Hexane trinit...
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