High-voltage electrolyte for lithium ion battery
A lithium-ion battery, high-voltage technology, applied in the field of lithium-ion batteries, can solve the problems of flatulence, affecting the battery rate performance of the separator wettability, high viscosity, etc., and achieve the effect of improving the rate performance, improving the poor stability of the high-temperature cycle, and improving the wettability
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[0041] Preparation of the battery: The test battery was assembled according to the conventional battery preparation method, with modified lithium cobaltate as the positive electrode, graphite as the negative electrode, and the current collectors of the positive and negative electrodes were aluminum foil and copper foil, respectively. The production method of the modified lithium cobaltate is as follows: polyvinylidene fluoride with a mass percentage of 3% is dissolved in 1-methyl-2-pyrrolidone solution, and LiCoO with a mass percentage of 94% 2 Add 3% conductive agent carbon black to the above solution and mix well.
[0042] Electrolyte preparation: in a glove box with an argon atmosphere (H 2 O6 Mix in certain proportions. The above-mentioned raw materials are added in sequence, fully stirred evenly, and the lithium-ion battery electrolyte (free acid<15 ppm, moisture<10 ppm) of the present invention is obtained.
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