An electrolyte solution comprising: - a solvent comprising a fluorinated acyclic carbonate represented by the formula: Rf 1 OCOORf 2 wherein Rf 1 and Rf 2 are the same or different from each other and are individually a C1-C4 alkyl group or a fluorine-containing alkyl group provided that at least one of Rf 1 and Rf 2 is a C1-C4 fluorine-containing alkyl group; - an electrolyte salt; and - 0.001-10 wt.-%, relative to the solvent, of at least one selected from the compounds of formulae and R 11 X 11 -SO 3 M 11 wherein R 11 is linear or branched C 1-6 -alkyl, C 2-6 -alkenyl or C 2-6 -alkynyl, C 3-6 -cycloalkyl, C 3-6 -cycloalkenyl, or C 3-6 -alkylsilyl; the alkyl, cycloalkyl and alkylsilyl may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and may have an ether bond or a thioether bond; X 11 is O or S; and M 11 is at least one of Li, Na, K, and Cs, and R 21 R 22 N-SO 3 M 21 wherein R 21 and R 22 each independently are linear or branched C 1-6 -alkyl, C 2-6 -alkenyl or C 2-6 -alkynyl, C 3-6 -cycloalkyl, C 3-6 -cycloalkenyl, or C 3-6 -alkylsilyl; the alkyl, cycloalkyl and alkylsilyl may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and R 11 and R 22 may bond to each other to form a cyclic structure; and M 21 is at least one of Li, Na, K, and Cs. - a solvent comprising a fluorinated acyclic carbonate represented by the formula: Rf 1 OCOORf 2 wherein Rf 1 and Rf 2 are the same or different from each other and are individually a C1-C4 alkyl group or a fluorine-containing alkyl group provided that at least one of Rf 1 and Rf 2 is a C1-C4 fluorine-containing alkyl group; - an electrolyte salt; and - 0.001-10 wt.-%, relative to the solvent, of at least one selected from the compounds of formulae and R 11 X 11 -SO 3 M 11 wherein R 11 is linear or branched C 1-6 -alkyl, C 2-6 -alkenyl or C 2-6 -alkynyl, C 3-6 -cycloalkyl, C 3-6 -cycloalkenyl, or C 3-6 -alkylsilyl; the alkyl, cycloalkyl and alkylsilyl may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and may have an ether bond or a thioether bond; X 11 is O or S; and M 11 is at least one of Li, Na, K, and Cs, and R 21 R 22 N-SO 3 M 21 wherein R 21 and R 22 each independently are linear or branched C 1-6 -alkyl, C 2-6 -alkenyl or C 2-6 -alkynyl, C 3-6 -cycloalkyl, C 3-6 -cycloalkenyl, or C 3-6 -alkylsilyl; the alkyl, cycloalkyl and alkylsilyl may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and R 11 and R 22 may bond to each other to form a cyclic structure; and M 21 is at least one of Li, Na, K, and Cs. R 11 is linear or branched C 1-6 -alkyl, C 2-6 -alkenyl or C 2-6 -alkynyl, C 3-6 -cycloalkyl, C 3-6 -cycloalkenyl, or C 3-6 -alkylsilyl; the alkyl, cycloalkyl and alkylsilyl may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and may have an ether bond or a thioether bond; X 11 is O or S; and M 11 is at least one of Li, Na, K, and Cs, and R 21 and R 22 each independently are linear or branched C 1-6 -alkyl, C 2-6 -alkenyl or C 2-6 -alkynyl, C 3-6 -cycloalkyl, C 3-6 -cycloalkenyl, or C 3-6 -alkylsilyl; the alkyl, cycloalkyl and alkylsilyl may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and R 11 and R 22 may bond to each other to form a cyclic structure; and M 21 is at least one of Li, Na, K, and Cs.