Patent ID: 8128833

Claim:
An electrolyte for electronic devices comprising at least one conductive salt consisting of: a) a cation which is an imidazolium compound of the formula: wherein R 1 , R 2 , R 3 , R 4 and R 5 are the same or different and are selected from the group consisting of hydrogen, an alkyl of 1-4 carbon atoms and fluoroalkyl, and b) an anion selected from the group consisting of triflate, tetrafluoroborate, hexafluoroborate and fluorohydrogen fluoride, c) a solvent comprising at least one member of the group consisting of ethylene carbonate, propylene carbonate, dimethyl acetamide, dimethyl formamide and gamma butyrolactone, and d) a compound selected from the group consisting of methylene chloride, methylacetate and methyl formate in the amount of about 1-15 wt %, said salt being in a concentration of at least 1.5 M.