Electrolyte for magnesium rechargeable battery and preparation method thereof

An electrolyte solution for a magnesium rechargeable battery comprising

• an organic solvent selected from tetrahydrofuran (THF), glyme, diglyme, triglyme, tetraglyme, dioxane, anisole, crown ethers, polyethylene glycol, acetonitrile, propylene carbonate, and mixtures thereof;
• a metal chloride selected from AlCl3-nR′n (where n is an integer from 0 to 3 and R′ is selected from alkyl, aryl, heteroaryl, and alkenyl groups), BCl3-nR′n (where n and R′ are as defined above), CrCl3, FeCl3, MnCl2, FeCl2, CoCl2, NiCl2, CuCl2, ZnCl2, TiCl4, ZrCl4, VCl4, NbCl5, RhCl3, and mixtures thereof;
• an ionic liquid comprising a compound of Formula 1:
• wherein R is selected from unsubstituted C1-C10 linear or branched alkyl groups, C1-C10 linear or branched alkyl groups substituted with a C1-C10 linear or branched alkoxy group, unsubstituted C5-C12 cycloalkyl groups, C5-C12 cycloalkyl groups substituted with a C1-C10 linear or branched alkoxy group, unsubstituted C5-C12 aryl groups, C5-C12 aryl groups substituted with a C1-C10 linear or branched alkoxy group, unsubstituted allyl groups, and allyl groups substituted with a C1-C10 linear or branched alkoxy group, and X is selected from halogen groups, unsubstituted sulfonimide groups, sulfonimide groups substituted with a halogenated alkyl group, unsubstituted sulfonamide groups, and sulfonamide groups substituted with a halogenated alkyl group;
• and
• an alkylalkoxyaluminate comprising at least one of [Al(C4H8O)2]− which corresponds to Formula (3):
• and [AlCl2(C4H8O)]− which corresponds to Formula (4)