TECHNOLOGY FOCUS - ELECTRONICS - Preferred Electrolyte: The electrolyte further comprises a secondary electrolyte salt, which is different from the electrolyte salt and having a lower concentration than the electrolyte salt, where the secondary electrolyte salt comprises at least one carbon atom and at least two fluoride atoms and is selected from: v) linear imide salt having formula LiN(-SO2-R1)2, vi) cyclic imide salt having formula LiN(-SO2-R1-), and vii) methide salt having formula LiC(-SO2-R1)3; and the electrolyte further comprises a flame-retardant additive comprising a cyclic phosphazene; and an ionic liquid (ionic liquid is present at a concentration of 1-25% by weight). The electrolyte preferably comprises: an electrolyte salt (having a concentration of at least 0.5 M) selected from LiPF5C2F5, LiPF5C4F9, LiPF5C3F7, LiPF3(C2F5)3, LiPF3(CF3)3, LiPF3(C3F7)3, LiPF3(C4F9)3, LiPF2(C2F5)4, LiPF(C2F5)5, LiBF3CF3, LiBF3C2F5, LiBF3C3F7, LiBF3C4F9, LiBF2(CF3)2, LiBF2(C2F5)2, LiBF2(C3F7)2, and LiBF2(C4F9)2; a fluorinated solvent selected from 1-methoxyheptafluoropropane, methyl nonafluorobutyl ether, ethyl nonafluorobutyl ether, 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-(trifluoromethyl)-pentane, 3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-trifluoromethyl-hexane, and 1,1,1,2,3,3-hexafluoro-4-(1,1,2,3,3,3-hexafluoropropoxy)-pentane; and a non-fluorinated solvent selected from an ester, an ether, and a carbonate.R1=1-8C fluorinated alkyl.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The fluorinated solvent is selected from 1-methoxyheptafluoropropane, methyl nonafluorobutyl ether, ethyl nonafluorobutyl ether, 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-(trifluoromethyl)-pentane, 3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-trifluoromethyl-hexane, and 1,1,1,2,3,3-hexafluoro-4-(1,1,2,3,3,3-hexafluoropropoxy)-pentane (preferably methyl nonafluorobutyl ether). The fluorinated alkyl of the electrolyte salt has the chain length of at least 2. The electrolyte salt comprises one of LiPF5C2F5, LiPF5C4F9, LiPF5C3F7, LiPF3(C2F5)3, LiPF3(CF3)3, LiPF3(C3F7)3, LiPF3(C4F9)3, LiPF2(C2F5)4, or LiPF(C2F5)5; or one of LiBF3CF3, LiBF3C2F5, LiBF3C3F7, LiBF3C4F9, LiBF2(CF3)2, LiBF2(C2F5)2, LiBF2(C3F7)2 or LiBF2(C4F9)2. The secondary electrolyte salt comprises one of LiN(SO2CF2CF3)2, LiN(SO2CF3)2, LiN(SO2F)2, LiC(SO2CF3)3, or LiC(SO2CF2CF3)3. The ionic liquid comprises at least one material selected from pyridinium, piperidinium, imidazolium, and phosphonium ionic liquids. The fluorinated solvent has a dynamic viscosity of 0.3-5.0 cP. EXAMPLE - No suitable example given.