TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The conducting salt is chosen from lithium salt of formula: Li(F6-xP(CyF2y+1)x), lithium borate of formula: Li(B(R10)4), Li(B(R10)2(OR11O)) or Li(B(OR11O)2), lithium salt of formula: Li(X(CnF2n+1SO2)m), lithium perchlorate, lithium hexafluoroarsenate, lithium trifluoromethane sulfonate, lithium hexafluorosilicate, lithium hexafluoroantimonate, lithium tetrachloroaluminate, lithium tetrafluoro(oxalato)phosphate and lithium oxalate. The anode active material contains lithium-ion intercalating carbon. The cathode active material comprises a material capable of occluding and releasing lithium ions chosen from lithiated transition metal phosphates of olivine structure, lithium-ion intercalating transition metal oxides with layer structure of formula: Li(1+z)(NiaCobMnc)(1-z)O2+e, lithiated transition metal mixed oxides of spinel structure of formula: Lii+tM2-tO4-d containing more than 60 mol% manganese and 30 mol% or less metals chosen from groups III-group XII of the periodic table, and lithium cobalt phosphate.x=0-6;n,y=1-20;R10=F, Cl, Br, I, or 1-4C alkyl, 2-4C alkenyl, 2-4C alkinyl, O1-4C alkyl, O2-4C alkenyl or O2-4C alkinyl (all optionally substituted by one or more OR12);R12=1-6C alkyl, 2-6C alkenyl or 2-6C alkinyl;OR11O=bivalent group derived from 1,2-diol, 1,3-diol, 1,2-dicarboxlic acid, 1,3-dicarboxlic acid or 1,2- hydroxycarboxylic acid or 1,3-hydroxycarboxylic acid, in which bivalent group forms 5 or 6-membered cycle via both oxygen atoms with central B atom;z=0-0.3;a,b,c=0-0.8;or a+b+c=1;e=-0.1 to 0.1;andd,t=0-0.4.(i) When X is oxygen or sulfur, then m is 1; (ii) When X is nitrogen or phosphorus, then m is 2; and (iii) When X is carbon or silicon, then m is 3.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The acetylene-containing compound is chosen from 1-methyl-propargyl methanesulfonate, 1-ethyl-propargyl methanesulfonate, 1-n-propyl-propargyl methanesulfonate, 1-i-propyl-propargyl methanesulfonate, 1-cyclohexyl-propargyl methanesulfonate, 1-methyl-propargyl methylcarbonate, 1-ethyl-propargyl methylcarbonate, 1-n-propyl-propargyl methylcarbonate, 1-i-propyl-propargyl methylcarbonate and 1-cyclohexyl-propargyl methylcarbonate. The aprotic organic solvent is chosen from optionally partly halogenated cyclic and noncyclic organic carbonate, 1-10C dialkyl ether, 1-4C dialkyl 2-6C alkylene ether and polyether, cyclic ether, cyclic and acyclic acetal and ketal, orthocarboxylate, cyclic and noncyclic ester of carboxylic acid, cyclic and noncyclic sulfone, cyclic and noncyclic nitrile and dinitrile, and ionic liquid. The additive is chosen from vinylene carbonate and its derivatives, vinyl ethylene carbonate and its derivatives, methyl ethylene carbonate and its derivatives, lithium(bisoxalato)borate, lithium difluoro(oxalato)borate, lithium tetrafluoro(oxalato)phosphate, lithium oxalate, 2-vinyl pyridine, 4-vinyl pyridine, cyclic exo-methylene carbonate, sultone, cyclic and acyclic sulfonate, cyclic and acyclic sulfite, cyclic and acyclic sulfinate, organic esters of inorganic acid, acyclic and cyclic alkane having boiling point at 1 bar of 36 degrees C or more, and aromatic compound, optionally halogenated cyclic and acyclic sulfonylimide, optionally halogenated cyclic and acyclic phosphate ester, optionally halogenated cyclic and acyclic phosphine, optionally halogenated cyclic and acyclic phosphite including optionally halogenated cyclic and acyclic phosphazene, optionally halogenated cyclic and acyclic silylamine, optionally halogenated cyclic and acyclic halogenated ester, optionally halogenated cyclic and acyclic amide, optionally halogenated cyclic and acyclic anhydride, and optionally halogenated organic heterocycle. The content of aprotic organic solvent, conducting salt, acetylene-containing compound and additive is 60-99.9 wt.%, 0.1-25 wt.%, 0.01-5 wt.% and 0-10 wt.% with respect to total weight of the electrolyte composition.