Electrolyte and lithium ion battery

In order to overcome the problems of insufficient storage performance and cycle performance of existing lithium ion batteries, the present application provides an electrolyte, comprising a solvent, a lithium salt and an additive, wherein the additive comprises vinylene carbonate, 3,3′-[1,2-ethylenebis (oxy)]dipropionitrile and lithium difluoro (oxalate) borate, and a weight ratio of vinylene carbonate, 3,3′-[1,2-ethylenebis (oxy)]dipropionitrile and lithium difluoro (oxalate) borate is 1:0.2-6:0.01-5. Meanwhile, the application also discloses a lithium ion battery comprising the above electrolyte. The electrolyte provided by the present application can effectively improve the high-temperature storage performance and cycle performance of batteries.