TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The electrolyte mixture has an ionic conductivity is greater than or equal to 2.9x 10-3 S/cm at 29 degrees C. The inorganic anion is an imide having a large electronic delocalization and a low melting temperature. The inorganic anion is selected from trifluoromethanesulfonate, bis(trifluoro methane sulfonyl)imide, bis(trifluoro methane sulfonyl)amide, hexafluorophosphate, tetrafluoroborate, tetraperchlorate, bisperfluoroethylsulfonyl imide. The mass ratio of the polymer to the ionic liquid is 0.01-10. The lithium salt has at least one of the following characteristics: good ionic conductivity, thermal stability, and oxidation resistance. The lithium salt is at least one compound selected from LiPF6, LiBF4, LiClO4, LiCF3SO3, LiN(CF3SO2)2, LiSbF6, LiAsF6, LiN(CF3CF2SO2)2, (C2H5)4NBF4, (C2H5)3CH3NBF4 and LiI. The ratio of moles of lithium salt to kg of ionic liquid is 0.01-3 m. The battery is rechargeable. The positive electrode comprises sulfur.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The ionic liquid comprises an organic cation and an inorganic anion. The organic cation features at least one of the following characteristics: high ionic conductivity, thermal stability, and wide electrochemical stability. The organic cation comprises a bulky asymmetrical structure. The organic cation is selected from N-methyl-N-alkyl-pyrrolidinium, N-methyl-N-alkyl-pyridinium, N-methyl-N-alkyl-piperidinium, N-methyl-N-alkyl-imidazolium, N-methyl-N-alkyl-phosphonium, N-methyl-N-alkyl-Guanidinium, N-methyl-N-alkyl-isouronium, N-methyl-N-alkyl-thiouronium, and N-methyl-N-alkyl-ammonium.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer has at least one of the following characteristics aproticity, inertness, good solvent properties, and retains a low viscosity of the ionic liquid containing mixture. The polymer is a glyme (preferably poly(ethylene glycol)dimethyl ether(polyglyme, PEGDME), tetra(ethylene glycol) dimethyl ether (tetraglyme, TEGDME), tri(ethylene glycol) dimethyl ether (triglyme)). The low molecular weight polymer has weight-average molecular weight of 75-2000. The low molecular weight polymer has a weight-average molecular weight of 100-1000. The low molecular weight polymer has a weight-average molecular weight of 250-500. EXAMPLE - No suitable example given.