Solvents and new electrolytic compositions having a large stability range and high conductivity

摘要

Aprotic polar compound (I) having solvent properties, is new. Aprotic polar compound (I) of formula (R 1R 2NX(Z)R 7) having solvent properties, is new. X : C or SO; Z : O, NSO 2NR 3R 4or NCN; R 1, R 21-18C alkyl, 1-18C oxaalkyl, 1-18C alkylene or 1-18C oxaalkylene; R 3, R 61-18C alkyl or 1-18C oxaalkyl; R 7R f, R fCH 2O-, (R fCH 2) 2N- or NR 5R 6; and R f1-4C alkyl, 1-4C oxaalkyl or 1-4C azaalkyl, preferably fluorinated. Provided that when Z is O then R fis not 1-4C alkyl and when Z is O and X is SO, then R fis not 1-4C alkyl or 1-4C oxaalkyl. Independent claims are included for: (1) an electrolytic composition comprising (I), a soluble salt in the compound and having an anion with delocalized charge and at least a polymer; (2) a storage system of electrical energy of super capacity type, using the electrolyte composition as electrolyte; and (3) an electrochemical generator comprising the electrolytic composition as electrolyte.