TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The anode is one or more active materials of carbon, graphite, graphene, silicon, tin, silicon/cobalt doped carbon, lithium alloys such as lithium-aluminum, lithium-silicon, lithium-tin, and lithium-magnesium, silicon alloys of tin, nickel, copper, iron, cobalt, manganese, zinc, indium, silver, titanium, germanium, bismuth, antimony, and/or chromium or metal oxide such as lithium titanate oxide. The cathode is one or more active materials of lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, lithium nickel manganese cobalt, lithium nickel cobalt aluminum oxide, lithium nickel manganese oxide, lithium vanadium oxide, lithium iron disulfide, silver vanadium oxide, carbon monofluoride, copper oxide and/or sulfur.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The electrolyte composition comprises the phosphonium cations and one or more anions comprising 41 anions e.g. hexafluorophosphate, trifluoro-(trifluoro-bis(trifluoromethyl)phosphoranuidyl)methane, tetrafluoroborate, trifluoro(trifluoromethyl)boranuide, difluoro-bis(trifluoromethyl)boranuide, fluoro-tris(trifluoromethyl)boranuide, tetrakis(trifluoromethyl)boranuide, 4,4-difluoro-3,5-dioxa-4-boranuidacyclopentane-1,2-dione, 4-fluoro-4-(trifluoromethyl)-3,5-dioxa-4-boranuidacyclopentane-1,2-dione, 2,2,5,5-tetrafluoro-1,3,4,6,2-dioxadithiaborinan-2-ium 4,6-dioxide, 2-fluoro-2-(trifluoromethyl)-1,3,4,6,2-dioxadithiaborinan-2-ium 4,6-dioxide, 2,2-bis(trifluoromethyl)-1,3,4,6,2-dioxadithiaborinan-2-ium 4,6-dioxide, 5,5-difluoro-2,2-bis(trifluoromethyl)-1,3,4,6,2-dioxadithiaborinan-2-ium 4,6-dioxide, trifluoromethanesulfonic acid, bis(trifluoromethanesulfone)imide, 5-fluoro-5-(trifluoromethyl)-4,6-dioxa-5-boranuidacyclohexane-1,2,3-trione, fluoro(trifluoromethyl)borane, substituted 5-fluoro-5-(trifluoromethyl)-4,6-dioxa-5-boranuidacyclohexane-1,3-dione compounds of formula (A)substituted 5,5-bis(trifluoromethyl)-4,6-dioxa-5-boranuidacyclohexane-1,3-dione compounds of formula (B), substituted 1,5,7,11-tetraoxa-6-boranuidaspiro(5.5)undecane-2,4,8,10-tetrone compounds of formula (C), substituted fluoro-diformyloxy-(trifluoromethyl)boranuide compounds of formula (D), substituted triformyloxy(trifluoromethyl)boranuide compounds of formula (E), substituted difluoro-formyloxy-(trifluoromethyl)boranuide compounds of formula (F), substituted 6-fluoro-6-(trifluoromethyl)-5,7-dioxa-6-boranuidacycloheptane-1,4-dione compounds of formula (G) and substituted 6,6-bis(trifluoromethyl)-5,7-dioxa-6-boranuidacycloheptane-1,4-dione compounds of formula (H). The electrolyte composition comprises the phosphonium salts and one or more lithium salts comprising lithium hexafluorophosphate, lithium tetrafluoroborate , lithium perchlorate, lithium hexafluoroarsenate, lithium trifluoromethanesulfonate, lithium bis(trifluoromethanesulfonyl)imide, and/or lithium bis(pentafluoromethanesulfonyl)imide, 4,4-bis(trifluoromethyl)-3,5-dioxa-4-boranuidacyclopentane-1,2-dione bis(trifluoromethylsulfonyl)azanide, difluoro-bis(trifluoromethyl)boranuide, dicyanoazanide, fluoro-tris(trifluoromethyl)boranuide and/or trifluoro(1,1,2,2,2-pentafluoroethyl)boranuide. The electrolyte composition comprises the phosphonium salts and lithium salts, and one or more solvents comprising acetonitrile, ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, ethylmethyl carbonate or methyl ethyl carbonate, methyl propionate, fluoroethylene carbonate, fluorobenzene, vinylene carbonate, vinyl ethylene carbonate, phenylethylene carbonate, propylmethyl carbonate, diethoxyethane, dimethoxyethane, tetrahydrofuran, gamma -butyrolactone and/or gamma -valerolactone. The electrolyte composition comprises the phosphonium salt and the phosphonium salt is cation of methyl cyanide and/or 1,1,1-trifluoro-N-(trifluoromethylsulfonyl)methanesulfonamide. The electrolyte composition comprises the phosphonium ionic liquids or salts and lithium salts in a mole ratio of 1:100-1:1. The electrolyte composition is primarily comprised of the lithium salts, where the phosphonium salts are additives. The electrolyte composition further comprises one or more conventional, non-phosphonium salts.R, R1, R2 = H or F.Preferred Components: The phosphonium salts may be liquid or solid at a temperature of 100 degrees C or below. The phosphonium ionic liquids or phosphonium salts is one cation and one anion pair, or multiple cations and multiple anions. The phosphonium based cation is ethyl-methyl-dipropyl-phosphonium ion, ethyl-dimethyl-propyl-phosphonium ion, triethyl-methyl-phosphonium ion, triethyl-propyl-phosphonium ion, tetraethyl-phosphonium ion, methyl-tripropyl-phosphonium ion, ethyl-tripropyl-phosphonium ion, triethyl-(3,3,3-trifluoro-propyl)-phosphonium ion, ethyl-(2,2,2-trifluoro-ethyl)-bis-(3,3,3-trifluoro-propyl)-phosphonium ion, methyl-(2,2,2-trifluoro-ethyl)-bis-(3,3,3-trifluoro-propyl)-phosphonium ion, or pentafluoroethyl-(2,2,2-trifluoro-ethyl)-bis-(3,3,3-trifluoro-propyl)-phosphonium ion. The anions are trifluoro-methanesulfonate, trifluoroacetate, 2,2,3,3,4,4,4-heptafluoro-butyric acid anion, 1,4,6,9-tetraoxa-5-boranuidaspiro(4.4)nonane-2,3,7,8-tetrone, nitrate ion, methanesulfonic acid anion, 1,1,2,2,3,3,3-heptafluoro-propane-1-sulfonic acid anion, 2,2,3,3,3-pentafluoro-propionic acid anion, formic acid anion, 1,4,6,9-tetraoxa-5-boranuidaspiro(4.4)nonane-2,3,7,8-tetrone, 4,4-difluoro-3,5-dioxa-4-boranuidacyclopentane-1,2-dione or tricyanomethanide. The anions are a mixture of tetrafluoroborate ion (BF4-) and trifluoro(trifluoromethyl)boranuide ion (CF3BF3-) at a concentration of BF4-:CF3BF3- mole ratio of 100/1-1/1. The anions are a mixture of hexafluorophosphate ion (PF6-) and CF3BF3- at a concentration of mole ratio of 100/1-1/1. The anions are a mixture of PF6- and BF4- at a concentration of mole ratio of 100/1-1/1. The phosphonium salts are added to selectively adjust one or more properties of the electrolyte composition. The phosphonium ionic liquids or salts and the conventional salts are present in the electrolyte composition at a mole ratio of 1:100-1:1. The conventional salts are tetraethylammonium tetrafluorborate, triethylmethylammonium tetrafluoroborate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide and 1-ethyl-3-methylimidazolium hexafluorophosphate.