A kind of lithium battery tertiary electrolyte

The invention discloses a kind of lithium battery tertiary electrolyte, including lithium salts, organic solvent and additive, the additive includes overcharge protection additives, flame-retardant additive.Compared with prior art, beneficial effects of the present invention are：Small molecule line style phosphazene compound has been used in the lithium battery tertiary electrolyte of the present invention, has promoted the formation of SEI films, has reduced the addition of film for additive, has reduced internal resistance, improves cycle performance, but also there is fire retardation；The present invention also added overcharge protection additives, improve the safety issue of lithium ion battery, especially reduce the problem of overcharging explosion.