TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The cathode active material comprises a material capable of occluding and releasing lithium ions chosen from lithiated transition metal phosphate of olivine structure, lithium ion intercalated transition metal oxide with layer structure, and lithiated transition metal mixed oxide of spinel structure. The anode active material is a material which can reversibly occlude and release lithium ions chosen from lithium ion intercalated carbonaceous material, lithium ion intercalated oxide of titanium, and silicon.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The component (A) is chosen from partially halogenated cyclic and noncyclic organic carbonates, partially halogenated di-1-10C-alkyl ethers, partially halogenated di-1-4C-alkyl-2-6C-alkylene ether and polyether, partially halogenated cyclic ether, partially halogenated cyclic and acyclic acetal and ketal, partially halogenated orthocarboxylate, partially halogenated cyclic and noncyclic ester of carboxylic acid, partially halogenated cyclic and noncyclic sulfone, partially halogenated cyclic and noncyclic nitrile and dinitrile, and partially halogenated ionic liquid. The component (D) is chosen from vinylene carbonate and its derivatives, vinyl ethylene carbonate and its derivatives, methyl ethylene carbonate and its derivatives, lithium bis(oxalato)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 ester of inorganic acid, acyclic and cyclic alkane having boiling point of 36 degrees C at 1 bar, 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, 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, optionally halogenated organic heterocyclic compound. The content of component (A), component (B), component (C) and component (D) with respect to total weight of electrolyte composition is 60-99.9 wt.%, 0.01-40 wt.%, 0-25 wt.% and 0-10 wt.%, respectively. The organolithium compound is of formula: Li(B(OC(O)C(O)O)(OCH(CF3)2)2), Li(B(OCH(CF3)2)4), Li(B(OCH2CF3)4), Li(Al(OCH(CF3)2)4), Li(Al(OC(CH3)(CF3)2)4), or Li(Al(OC(CF3)3)4). The component (C) is chosen from lithium hexafluorosilicate, lithium perchlorate, lithium hexafluoroarsenate, lithium tetrafluoro(oxalato)phosphate, lithium oxalate, lithium hexafluoroantimonate, lithium tetrachloroaluminate, lithium trifluoromethanesulfonate, and lithium compounds of formula: Li(F6-xP(CyF2y+1)x), Li(B(R1')4), Li(B(R1')2(OR2'O)), Li(B(OR2'O)2) and Li(X(CnF2n+1SO2)m).X=0-6;y=1-20;R1'=F, Cl, Br, I, or 1-4C alkyl, 2-4C alkenyl or 2-4C alkynyl (all optionally substituted by OR3');R3'=1-6C alkyl, 2-6C alkenyl or 2-6C alkynyl;(OR2'O)=bivalent group derived from 1,2- or 1,3-diol, 1,2- or 1,3-dicarboxlic acid or 1,2- or 1,3-hydroxycarboxylic acid;m=1-3;andn=1-20.(i) When X is O or S, m is 1; (ii) When X is N or P, m is 2; and (iii) When X is C or Si, m is 3.