Battery containing bis(perfluoroalkylsulfonyl)imide and cyclic perfluoroalkylene disulfonylimide salts

A battery comprising:

• at least one positive electrode;
• at least one negative electrode;
• at least one aluminum current collector in electrical contact with the positive electrode;
• an electrolyte composition comprising a salt disposed in a matrix, said salt having the formula ##STR9## in which R.sub.f1 and R.sub.f2 are each independently a straight or branched perfluoroalkyl group of 1 to 12 carbon atoms, a perfluorocycloalkyl group or a perfluorocycloalkyl perfluoroalkyl group of 4-7 ring carbon atoms and 1-4 carbon atoms on the alkyl chain wherein the ring carbon atoms may be optionally substituted by a straight or branched perfluoroalkyl group of 1 to 12 carbon atoms, with R.sub.f1 and R.sub.f2 taken together having a total of at least 3 carbon atoms;
• R.sub.f3 is a perfluoroalkylene moiety of 2 to 6 carbon atoms optionally substituted by a straight or branched perfluoroalkyl group of 1 to 12 carbon atoms or a perfluorocycloalkyl group of 4-7 carbon atoms;
• M is a cation with a valence equal to n;
• and
• n is an integer of 1 to 4, wherein the voltage measured at the positive electrode is greater than 3.0 volts vs. Li/Li.sup.+ ;
• and
• the electrolyte composition further comprises a NO.sub.3.sup.- salt.