TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: Anion of the lithium salt is chosen from fluorine, chlorine, bromine, iodine, nitrate, N-cyanocyanamide, tetrafluoroborate, perchlorate, hexafluorophosphate, trans-bis(trifluoromethyl)tetrafluorophosphate, pentafluorosulfate anion (CF3CF2SO3-), pentafluorophosphate anion ((CF3)4PF2-), tetrafluorophosphate anion ((CF3)5PF-), trifluorophosphate anion ((CF3)6P-), trifluorosulfate (CF3SO3-), trifluorosulfur dioxide anion ((CF3SO2)2N-), fluorosulfur dioxide ((FSO2)2N-), octafluoro carbon monoxide anion (CF3CF2(CF3)2CO-), pentafluorosulfanyl anion ((SF5)3C-), hexafluorosulfanyl anion ((CF3SO2)3C-), acetate anion (CH3CO2-), thiocyanate (SCN-) and pentafluoro nitrile ((CF3CF2SO2)2N-).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The sulfolane compound (I) is chosen from 2-fluoro-sulfolane, 3-fluoro-sulfolane, 2,3-difluoro-sulfolane, 3-vinyl-sulfolane, 3-allyl sulfolane, 2-methyl sulfolane, 3-methyl sulfolane, 3-ethyl sulfolane, 2,3-dimethyl sulfolane, 3-methoxy-sulfolane, and 3-ethoxy sulfolane. The organic solvent is chosen from ether, ester, amide, linear carbonate and cyclic carbonate. The cyclic carbonate is chosen from ethylene carbonate, polypropylene carbonate, 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate and vinylene carbonate. The linear carbonate is dimethyl carbonate, diethyl carbonate, dipropyl carbonate, ethyl methyl carbonate, methyl propyl carbonate and ethyl propyl carbonate. The ether is chosen from dimethyl ether, diethyl ether, dipropyl ether, methyl ethyl ether, methyl propyl ether and ethyl propyl ether. The ester is chosen from methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, ( gamma )-butyrolactone, ( gamma )-valerolactone, ( gamma )-carprolactone, ( omega )-valerolactone and ( eta )-carprolactone. The non-aqueous electrolyte solution further comprises vinylene carbonate, vinyl ethylene carbonate, fluoro ethylene carbonate, cyclic sulfite, saturated sultone, and unsaturated sultone.