Patent ID: 7833661

Claim:
An electrolyte having an additive wherein said additive consists of 1,3-propane sultone, succinic anhydride, ethenyl sulfonyl benzene, and halobenzene, wherein the weight of said 1,3-propane sultone is between 0.5 wt. % and 96.4 wt. % of the weight of said additive; wherein the weight of said succinic anhydride is between 0.5 wt. % and 96.4 wt. % of the weight of said additive; wherein the weight of said ethenyl sulfonyl benzene is between 0.5 wt. % and 95.2 wt. % of the weight of said additive; and wherein the weight of said halobenzene is between 0.5 wt. % and 95.2 wt. % of the weight of said additive.