| abstract |
An electrolyte composition comprising a fluorinated solvent, at least one silyl oxalate represented by the formula RR'Si (C 2 O 4 ), and LiPF 6 is disclosed herein, wherein R and R 'are each the same or different C 1 -C 8 alkyl, C 2 -C 8 alkenyl, C 2 -C 8 alky, optionally containing at least one substituent selected from halogen, hydroxyl, alkoxy, carbonyl, Or a C 6 -C 10 aryl radical. An electrolyte composition comprising a fluorinated solvent and a lithium oxalate phosphate salt represented by the formula LiPF (6-2q) (C 2 O 4 ) q is also disclosed herein, wherein q is 1, 2, or 3; Wherein the oxalate phosphate salt comprises at least one moiety derived from at least one silyl oxalate as defined herein. Electrolyte compositions are useful in electrochemical cells such as lithium ion batteries. |