| abstract |
Desirable electrolyte compositions suitable for high voltage lithium ion batteries having a rated charge voltage of at least about 4.45 volts are described. The electrolyte composition can include ethylene carbonate and a solvent composition selected from the group consisting of dimethyl carbonate, methyl ethyl carbonate, γ-butyrolactone, γ-valerolactone, or combinations thereof. The electrolyte can further include a stabilizing additive. The electrolyte can be used efficiently with a positive electrode active material rich in lithium. |