Abstract: The invention relates to sulfonate compounds with the following formula (I): in which: R2 represents an ethyl group, an n-propyl group or an isopropyl group; when R2 is an ethyl group, R1 is an ethyl group, an n-propyl group or an n-butyl group; when R2 is an n-propyl group, R1 is a methyl group, an ethyl group, an n-propyl group or an n-butyl group; or when R2 is an isopropyl group, R1 is a methyl group, an ethyl group, an n-propyl group or an n-butyl group. Use of these compounds as electrolyte solvent for lithium batteries.

Abstract: The invention relates to sulfonate compounds with the following formula (I): in which: R2 represents an ethyl group, an n-propyl group or an isopropyl group; when R2 is an ethyl group, R1 is an ethyl group, an n-propyl group or an n-butyl group; when R2 is an n-propyl group, R1 is a methyl group, an ethyl group, an n-propyl group or an n-butyl group; or when R2 is an isopropyl group, R1 is a methyl group, an ethyl group, an n-propyl group or an n-butyl group. Use of these compounds as electrolyte solvent for lithium batteries.

Abstract: The invention relates to compositions comprising at least one fluorinated compound of the following formula (I): wherein: X corresponds to a unit of the following formula (II): or to a sequence of said unit of formula (II), wherein R3, R4, R5 et R6 represent, independently of each other, a halogen atom, a hydrogen atom, a perfluoroalkoxy group, a perfluoroalkyl group provided that at least one of said R3, R4, R5 et R6 represents a fluorine atom, a perfluoroalkoxy group or a perfluoroalkyl group; R1 and R2 represents, independently of each other, an alkyl group; and comprising at least one lithium salt.