TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The ratio is 1.2-3, 1.3 or greater, 1.5 or greater, 1.3-3 or 1.3-2. The anode comprises a lithium intercalated electrode material, preferably lithium titanate. The cathode comprises lithium-manganese compound of formula LixMn2O4, lithium-cobalt compound of formula LixCoO2, modified LixMn2O4 electrodes, lithium-manganese-copper compound of formula LixMn2-xCuxO4, LiM(0.02)Mn(1.98)O4, transition metal oxide or an electrochemically active conductive polymer. The cathode is lithium cobalt dioxide or lithium iron phosphate.x = 0.1-0.5; andM = B, Cr, Fe or Ti.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The electrolyte further comprises a pyrazolium cation. The non-Lewis acid derived anion comprises an imide, bis(perfluoroethylsulfonyl)imide (BETI), methide and/or triflate (TF), and forms a lithium (Li) salt comprising Li-imide, Li-BETI, Li-methide and/or Li-TF. The electrolyte comprises a binary salt mixture comprising a mixture of single salts, at least one of which contains a pyrazolium cation or an imidazolium cation. The binary salt mixture comprises a second cation which differs from the pyrazolium cation or the imidazolium cation. The second cation is in the form of the lithium salt. The pyrazolium cation or the imidazolium cation and the second cation are both in the form of a salt and at least one of the two salts comprising 1,3-dimethylimidazolium (DMI)BETI, 1-ethyl-3-methyl-imidazolium (EMI)BETI, DMI-imide, EMI-imide, DMI-methide, EMI-methide, DMITF or EMITF. The electrolyte further comprises a cation, which is imidazolium cation of formula (a) or cyclopentane cation of formula (b). The electrolyte further comprises at least one pyrazolium cation and/or imidazolium cation, where (I) at least charges and discharges over a temperature range of 20-100 degrees C, 20-125 degrees C, 20-150 degrees C, 20-170 degrees C or 50-120 degrees C. The electrolyte further comprises an imidazolium cation-containing molten salt, together with a dissolved lithium salt, where the electrolyte exhibits an oxidation limit of greater than 5V vs. lithium, reduction voltage less than 1.5 V vs. lithium, and a thermal stability of up to at least 50 degrees C. The thermal stability is up to at least 100 degrees C, 150 degrees C, 200 degrees C, 250 degrees C or 300 degrees C. The electrolyte further comprises a pyrazolium cation-containing molten salt, together with a dissolved lithium salt, where the electrolyte exhibits an oxidation limit of greater than 5V vs. lithium, reduction voltage less than 1.5 V vs. lithium, and a thermal stability of up to at least 50 degrees C. The thermal stability is up to at least 100 degrees C, 150 degrees C, 200 degrees C or 250 degrees C. The non-Lewis acid derived anion is sulfonic anion of formula (R6SO3-), (c), (R7-SO2-(N-)-SO2-R8) or (R7-SO2-(C-)-(SO2-R8)-SO2-R10). The electrolyte comprises a ternary molten salt mixture comprising a mixture of three single salts, at least one of which contains the imidazolium cation. The ternary molten salt mixture comprises a second cation which differs from the imidazolium cation, and a third cation which differs from the imidazolium cation and the second cation. The second and third cations are in the form of the lithium salt. The imidazolium cation, the second cation, and the third cation are in the form of a salt, and the anions of the three salts are the same. The imidazolium cation, the second cation, and the third cation are in the form of a salt, and at least one of the three salts comprises 1,2-dimethylpyrazolium (DMP)BETI, DMIBETI, 1-ethyl-2-methylpyrazolium (EMP)BETI, EMIBETI, DMP-imide, DMI-imide, EMP-imide, EMI-imide, DMP-methide, DMI-methide, EMP-methide, EMI-methide, DMPTF, DMITF, EMPTF or EMITF, and another one of the three salts comprises Li-BETI, Li-imide, Li-methide and/or Li-TF. The pyrazolium cation and/or imidazolium cation is present as a pyrazolium salt, an imidazolium salt, or a pyrazolium and imidazolium salts, together with the dissolved lithium salt, which are distributed throughout a polymer matrix.R1, R2 = 1-12C alkyl;R3-R5 = H or 1-5C alkyl;R6-R8, R10 = separate 1-4C halogenated alkyl; andR9 = 2-6C halogenated alkylene moiety.