A high-voltage electrolyte additive, a high-voltage electrolyte containing the same, and a lithium ion battery
An electrolyte and additive technology, which is applied in the fields of high-voltage electrolyte additives, high-voltage electrolyte and lithium-ion batteries, can solve the problems of low improvement and difficulty in meeting the needs of use, so as to improve stability, reduce the loss of reversible capacity, Reduce the effect of polarization
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Embodiment 1
[0055] A kind of high voltage electrolytic solution, its preparation method comprises the steps:
[0056] (1) Mix ethylene carbonate, ethyl methyl carbonate and dimethyl carbonate in a mass ratio of 1:1:1 after using molecular sieve to remove water, then add LiPF 6 Dissolve and mix to make LiPF 6 The concentration is 1.0mol / L;
[0057] (2) Add the additive of the following structural formula to the solution obtained in step (1), mix to obtain a high-voltage electrolyte, and the additive amount is 0.2% of the total mass of the electrolyte.
[0058]
Embodiment 2
[0060] A kind of high voltage electrolytic solution, its preparation method comprises the steps:
[0061] (1) Mix ethylene carbonate, ethyl methyl carbonate and vinylene carbonate in a mass ratio of 1:1:1 after using molecular sieve to remove water, then add LiPF 6 Dissolve and mix to make LiPF 6 The concentration is 1.5mol / L;
[0062] (2) Add the additive of the following structural formula to the solution obtained in step (1), mix to obtain a high-voltage electrolyte, and the additive amount is 0.1% of the total mass of the electrolyte.
[0063]
Embodiment 3
[0065] A kind of high voltage electrolytic solution, its preparation method comprises the steps:
[0066] (1) Mix ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and succinonitrile in a mass ratio of 5:2:2:1 after using molecular sieve to remove water, then add LiPF 6 Dissolve and mix to make LiPF 6 The concentration is 1.0mol / L;
[0067] (2) Add the additive of the following structural formula to the solution obtained in step (1), and mix to obtain a high-voltage electrolyte, and the additive amount is 1.0% of the total mass of the electrolyte.
[0068]
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