A lithium secondary battery

Details A lithium secondary battery A lithium secondary battery

H - Electricity

01

M

H01M 10/40 (2006.01) H01M 6/16 (2006.01)

Patent

CA 2204927

Disclosed is an improved lithium secondary battery, comprising a negative electrode using as an active material at least one member selected from the group consisting of metallic lithium, lithium alloys and materials which are capable 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 represented by Formula III, which is trifluoroethyl carbonate: Image

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