Graphene lithium ion battery electrolyte
A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries, can solve problems such as poor cycle performance and rapid loss of lithium-ion battery capacity, and achieve the effects of improved voltage resistance, excellent cycle performance, and high capacity recovery rate
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[0022] Example 1
[0023] Graphene lithium ion battery electrolyte is prepared by the following steps: dissolve lithium hexafluorophosphate in vinylene carbonate under the effect of a magnetic field, stir for 5 hours, add vitamin E, octamethylcyclotetrasiloxane and hexamethyldisilazane , Ultrasonic vibration at room temperature for 5h, finally adding graphene, the intensity of the magnetic field is increased to 3500GS, ultrasonic vibration at -4℃ for 3h, the graphene lithium ion battery electrolyte is obtained; the electrolyte concentration in the electrolyte is 1.7mol / L , The frequency of ultrasonic vibration is 45Hz, the intensity of the magnetic field is 2100GS, based on the total weight of the electrolyte, the additive amount is: 5% hexamethyldisilazane, 0.5% octamethylcyclotetrasiloxane , 0.3% vitamin E and 4.5% graphene.
Example Embodiment
[0024] Example 2
[0025] Graphene lithium ion battery electrolyte is prepared by the following steps: Lithium tetrafluoroborate is dissolved in a mixture of γ-butyrolactone and dipropyl carbonate under the effect of a magnetic field, γ-butyrolactone and dipropyl carbonate The volume ratio is 2:1, stirring for 5.5h, adding vitamin E, octamethylcyclotetrasiloxane and hexamethyldisilazane, ultrasonic vibration at room temperature for 5.5h, and finally adding graphene to increase the intensity of the magnetic field to 3800GS, ultrasonic vibration at 0℃ for 4h to obtain graphene lithium ion battery electrolyte; among them, the electrolyte concentration in the electrolyte is 2.12mol / L, the ultrasonic vibration frequency is 50Hz, and the magnetic field strength is 2600GS. On a weight basis, the amount of additives added is 5.5% hexamethyldisilazane, 2.4% octamethylcyclotetrasiloxane, 4.1% vitamin E, and 5% graphene.
Example Embodiment
[0026] Example 3
[0027] Graphene lithium-ion battery electrolyte is prepared by the following steps: LiAsF 6 Dissolve in diethyl carbonate under the effect of a magnetic field, stir for 6.5h, add vitamin E, octamethylcyclotetrasiloxane and hexamethyldisilazane, vibrate ultrasonically at room temperature for 6h, and finally add graphene, the strength of the magnetic field Increase to 4000GS and ultrasonically vibrate at 5°C for 4.5h to obtain graphene lithium-ion battery electrolyte. Among them, the electrolyte concentration in the electrolyte is 2.35mol / L, the ultrasonic vibration frequency is 55Hz, and the magnetic field strength is 3200GS. The total weight of the electrolyte is based on the total weight of the electrolyte, and the additive amount is: 6.5% hexamethyldisilazane, 3.5% octamethylcyclotetrasiloxane, 5.3% vitamin E and 8.5% graphene.
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