Electrolyte composition including lithium salt, fluoroethylene carbonate, vinylene carbonate, and metal-trifluoromethanesulfonimide salt additive and battery and device including the electrolyte composition

An electrolyte composition for batteries is provided. The electrolyte composition includes a solvent blend that includes cyclic carbonate and linear carbonate. The electrolyte composition further includes a lithium-based salt, fluoroethylene carbonate, vinylene carbonate, and a metal-based salt additive. The metal-based salt additive includes counterions of a metal and trifluoromethanesulfonimide. The metal is chosen from magnesium (Mg), manganese (Mn), aluminum (Al), iron (Fe), nickel (Ni), or combinations thereof.