| 摘要 |
PURPOSE: A nonaqueous electrolyte solution and a lithium battery containing the electrolyte solution are provided, to improve cycle performance, storage property, electrical capacity and conductivity of a lithium battery. CONSTITUTION: The nonaqueous electrolyte solution comprises a nonaqueous solvent; an electrolyte; 0.001-10 wt% of a nitrile compound; and 4 wt% or less of a S=O group-containing compound. Preferably the nitrile compound is a mononitrile compound or a dinitrile compound. Preferably the S=O group-containing compound is dimethyl sulfite, diethyl sulfite, ethylene sulfite, propylene sulfite, vinylene sulfite, dimethyl sulfone, diethyl sulfone, divinyl sulfone, sulfolane, sulfolene, methyl methanesulfonate, ethyl methanesulfonate, propargyl methanesulfonate, methyl benzenesulfonate, 1,3-propane sultone, 1,4-butane sultone, dimethyl sulfate, diethyl sulfate, ethylene glycol sulfate or 1,2-propanediol sulfate. Also the nonaqueous electrolyte solution comprises a nonaqueous solvent; an electrolyte; and 0.001-10 wt% of a dinitrile compound. |
