Non-aqueous electrolyte for lithium ion battery and lithium ion battery comprising same
A non-aqueous electrolyte and lithium-ion battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as large impedance, inability to balance high-temperature performance and low-temperature performance, and lack of high-temperature effect of low-impedance additives to achieve reduction Effects of dissolution and high-temperature storage performance
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[0063] Examples 1-11 and Comparative Examples 2-5
[0064] The preparation process of embodiment 1-11 and comparative example 2-5 is the same as comparative example 1, and the difference is only in that the components and contents of the electrolyte are different, specifically:
[0065]In a glove box filled with argon, water and oxygen with qualified content, mix ethylene carbonate, diethyl carbonate and ethyl methyl carbonate in a mass ratio of 30:50:20 (the solvent and additives need to be normalized together) , and then quickly add additives (at least one of the compounds shown in formula 1, at least one of the compounds shown in formula 2, vinyl sulfate, lithium bisfluorosulfonimide), and the mixed solution is in - Freeze at a low temperature of about 10°C for 2-5h, and then quickly add 12.5wt% fully dried lithium hexafluorophosphate (LiPF 6 ), stirred evenly, and after passing the moisture and free acid detection, the electrolytes of Example 1-11 and Comparative Example ...
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