TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The positive electrode comprises a film formed on its surface, where the film is partially or wholly derived from the additive in the electrolyte. The film comprises an inorganic layer and an organic layer in a mixed form. The thickness of the film is 0.5-100 nm. The positive active material has an operating potential of 4.5V plus minus 0.5V.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The lithium salt is lithium hexafluorophosphate, lithium tetrafluoroborate, lithium fluoroantimonate, lithium hexafluoroarsenate, lithium triflate, lithium tris(trifluoromethyl sulfonyl)methane, lithium bis trifluoromethylsulfonyl imide, lithium nonafluorobutanesulfonate, lithium perchlorate, lithium aluminum oxide, lithium aluminum chloride, lithium tetraphenylborate, substituted lithium nitride compounds of formula (LiN(CzF2z+1SO2)(CzF2y+1SO2), lithium chloride, lithium iodide or lithium bisoxalate borate. The non-aqueous organic solvent is a carbonate-based solvent, an ester-based solvent, an ether-based solvent, a ketone-based solvent, an alcohol-based solvent and/or non-protonic solvent. The positive active material comprises lithium metal complex compound of formula (Li1+x(M)1-xO2).x = 0.05-0.2;M = transition metal; andz, y = are natural numbers.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The additive is present at 0.01-10 wt.%, preferably 0.01-1 wt.% based on a total weight of the electrolyte, in the electrolyte. Preferred Definitions:    Additive = 2-(1H-indol-3-yl)-ethylamine, 1-benzenesulfonyl-1H-indole, 2-amino-3-(1H-indol-3-yl)-propionic acid, 2-(1H-Indol-2-yl)-ethylamine, 2-indol-1-yl-ethylamine, (1H-indol-3-yl)methanamine, (1H-indol-1-yl)methanamine, (1H-indol-2-yl)methanamine, 2-amino-3-indol-1-yl-propionic acid, 2-amino-3-(1H-indol-2-yl)-propionic acid or 1,3,3-trimethylspiro(indoline-2,2'-phenanthro(9,10-b)(1,4)oxazine).    EXAMPLE - Tryptamine (0.1 wt.%) and lithium hexafluorophosphate (1.3 M) were mixed to organic solvent (comprised of ethylene carbonate (30 vol.%), diethyl carbonate (50 vol.%), and ethyl methyl carbonate (20 vol.%)) to obtain the electrolyte.