| 摘要 |
Disclosed is an improved lithium secondary battery, comprising a negati ve electrode using as an active material at least one member selected from the group consisting of metallic lithium, lithium alloys and materials which are capab le of electrochemically occluding and releasing lithium ions, a positive electrode using as an active material at least one compound which is capable of electrochemically occluding and releasing lithium ions, and an organic electrolyte comprising a lithium salt dissolved in a solvent composition, wherein the solvent composition for the organic electrolyte comprises a solvent mixture prepared by mixing (1) an organic solvent represented by Formula i, which is 4-trifluoromethyl-1,3-dioxolane-2-one, and (2) at least one member selected from the group consisting of an organic solvent represented by Formula II, which is 1-trifluoroethylmethyl carbonate, and an organic solvent represente d by Formula III, which is trifluoroethyl carbonate: |
