TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The anode contains material comprising lithium-titanium oxide chosen from Li4Ti5O12, Li2Ti3O7, LixTiO2, TiO2, and TiO2(OH)x. The anode material is additionally coated with carbon. The anode material is mixture of anode material and carbonaceous material chosen from graphite, hard carbon, amorphous carbon, carbon-containing core-shell material and silicon-containing material. The cathode contains materials comprising lithium-cobalt oxide (LiCoO2), lithium-nickel oxide (LiNiO2), lithium-nickel-cobalt-manganese oxide (LiNi1-x-yCoxMnyO2), lithium-nickel-cobalt-aluminum oxide (LiNi1-x-yCoxAlyO2), lithium-manganese oxide (LiMn2O4), lithium-metal-manganese oxide (LiM2-xMn4-yO4), lithium-metal phosphate (LiMPO4), where M is Fe, Mn, Co or Ni, and LiAyMxPO4, where A is B, P, Si, Ti, Zr, Hf, Cr, Mo or W. The cathode material is additionally coated with carbon, oxides or phosphates. The separator comprises ceramic and/or glass particles, such as ceramic-lithium-aluminum-titanium phosphate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The cyclic ethers are chosen from tetrahydrofuran (THF) and 2-methyltetrahydrofuran (2-Me-THF). The linear ether is dimethoxyethane (DME). The lactones are chosen from ( gamma )-butyrolactone (GBL) and valerolactone. The electrolyte solvent additionally comprises linear carbonates. The linear carbonates are chosen from dimethyl carbonates (DMC), diethyl carbonate (DEC) and ethyl methyl carbonate (EMC). The electrolyte salt is chosen from lithium perchlorate (LiClO4), lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium hexafluoroarsenate (LiAsF6), lithium hexafluoroantimonate (LiSbF6), lithium trifluoromethanesulfonate (LiCF3SO3), lithium bis((trifluoromethyl)sulfonyl)imide (LiN(CF3SO2)2), lithium bis((pentafluoroethyl)sulfonyl)imide (LiN(C2F5SO2)2), lithium bisoxalatoborate (LiBOB), lithium difluorooxalatoborate (LidFOB), lithium trifluoro tris(pentafluoroethyl)phosphate (LiFAP) and lithium tetraphenylborate (Li(C6H5)4B). The electrochemical cell electrolyte comprises 5% electrolyte additive. The electrolyte additive is chosen from vinylene carbonate, vinyl ethylene carbonate, propane sultone, N-containing heterocycles and aminated aromatic compounds. The N-containing heterocycle is chosen from pyrrole, 2-methyl-1-pyrroline, 1-methylpyrroline, 1-vinyl-2-pyrrolidinone, pyridine, 2-picoline, 3- picoline, 4-picoline, 2-vinylpyridine, 4-vinylpyridine, dimethyl-pyridine-amine (DMPA), and boran-pyridine-complex. The aminated aromatic compounds are chosen from aniline, toluidine, diphenylamine, naphtylamine, alkylaniline and dialkylaniline.