High-temperature-resistant high-voltage electrolyte of high-nickel lithium ion battery
A lithium-ion battery and ion battery technology, applied in the electrolyte field of lithium-ion batteries, can solve the problems of capacity loss, side reactions, battery swelling, etc., to improve high temperature performance and cycle performance, inhibit decomposition reaction, and improve stability. Effect
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Embodiment 1
[0016] The composition of the electrolyte in this embodiment is: the lithium salt part adopts a mass fraction of 13.75% LiPF 6 , 1%LiPO 2 f 2 and 2% LiFSI; the solvent part adopts EC, PC, DEC, EMC, DMC, and the corresponding mass percentage is 25:5:20:45:5; the additive part adopts mass fraction of 0.8% VC, 0.4% PS.
[0017] The mixing of the electrolyte is carried out in a closed environment with a water oxygen content of ≤1ppm; just mix well (the same below).
Embodiment 2
[0019] The composition of the electrolyte in this embodiment is: the lithium salt part adopts a mass fraction of 13.75% LiPF 6 , 1%LiPO 2 f 2 and 2% LiFSI; the solvent part adopts EC, PC, DEC, EMC, DMC, and the corresponding mass percentage is 25:5:20:45:5; the additive part adopts mass fraction of 0.8%VC and 0.2%VEC respectively , 0.4%PS, 0.3%PST.
Embodiment 3
[0021] The composition of the electrolyte in this embodiment is: the lithium salt part adopts a mass fraction of 13.75% LiPF 6 , 1%LiPO 2 f 2 and 2% LiFSI; the solvent part adopts EC, PC, DEC, EMC, DMC, and the corresponding mass percentage is 25:5:20:45:5; the additive part adopts mass fraction of 0.8%VC and 0.2%VEC respectively , 0.4%PS, 0.3%PST, 0.3%TAP.
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