TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Cation: The second cation is in the form of a lithium salt selected from LiBF4, LiAsF6, LiPF6 and LiTF.    TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Electrolyte: The electrolyte comprises a single salt consisting of pyrazolium cations and anions(X), preferably comprising a binary molten salt mixture comprising a mixture of single salts, at least one containing a pyrazolium cation.The binary molten salt comprises a mixture comprising a second cation which differs from the pyrazolium cation.The pyrazolium cation and the second cation are each in the form of a salt and the two salts are different, each containing the same pyrazolium cation.At least one of the two salts comprises DMPBF4, DMFPBF4, EMPBF4, EMFPBF4, EMPTF or DMFPTF.The electrolyte comprises a ternary molten salt mixture comprising a mixture of three single salts, at least one of which contains the pyrazolium cation.The ternary molten salt mixture comprises a second cation which differs from the pyrazolium cation and a third cation which differs from the pyrazoline cation and the second cation.At least one of the second and third cations is in the form of a lithium salt selected from LiBF4, LiAsF6, LiPF6 and LiTF.The pyrazolium cation, the second cation, and the third cation are in the form of a salt, and one of the anions of the three salts is different from the other two.The pyrazolium cation, the second cation and the third cation are in the form of a salt, and at least one of the three salts comprises DMPBF4, DMFPBF4, EMPBF4, EMFPBF4, EMPTF or DMFPTF and another of the three salts comprises LiBF4, LiPF6 or LiTF.The electrolyte further comprises at least one organic liquid comprising propylene carbonate, diethyl carbonate, ethyl carbonate, ethyl methyl carbonate, acetonitrile, benzonitrile, dimethyl dioxolane and/or methylformate.The pyrazolium cation is distributed through a polymer matrix.Preferred Electrochemical Cell: The electrochemical cell further comprises an anode and a cathode.The anode comprises a lithium metal, a lithiated carbon and/or a lithium intercalated electrode material.The cathode comprises LixMn2O4; LixCoO2; modified LixMn2O4 electrodes, LixMn2-xCuxO4 and a transition metal oxide or a electrochemically active conductive polymer;X = less than 0.5 and greater than 0.1;M = B, Cr, Fe and Ti. EXAMPLE - 1-ethyl-2-methylpyrazolium tetrafluoroborate (EMPBF4) was synthesized from N-methylpyrazole by:    (1) ethylation of N-methylpyrazole in toluene, using ethyl iodide; and    (2) anion exchange of 1-ethyl-2-methylpyrazolium iodide to produce.    The melting point was determined to be 49-50 degreesC. Elemental analysis of the EMPBF4 gave the results: 36.40% C; 5.35% H; 14.27% N (calculated values were 36.40% C, 5.56% H, 14.16% N).