Patent ID: 7169512

Claim:
An electrolytic solution, comprising: (a) a first high dielectric constant solvent, said first high dielectric constant solvent comprising a second solvent, wherein said second solvent is selected from ethylene carbonate, propylene carbonate or a mixture thereof; (b) dimethyl carbonate; and (c) diphenyl carbonate; wherein (i) a ratio A:T, A being the weight of said first high dielectric constant solvent and T being the weight of said electrolytic solution, is at least 0.05 and at most 0.4; (ii) a ratio B:T, B being the weight of said dimethyl carbonate and T being the weight of said electrolytic solution is at least 0.58 and at most 0.93; and (iii) a ratio C:T, C being the weight of said diphenyl carbonate, is at least 0.01 and at most 0.05.