TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The anode active material contains carbon capable of reversibly occluding and releasing lithium ions. The anode active material contains silicon or tin. The cathode active material comprises a material capable of occluding and releasing lithium ions selected from lithiated transition metal phosphates of olivine structure; lithium ion intercalating transition metal oxides with layer structure; and lithiated transition metal mixed oxides of spinel structure. The cathode active material is selected from LiFePO4, LiCoPO4, transition metal oxides with layer structure of general formula Li(1+z)(NiaCObMnc)(1-z)O2+e; and lithiated transition metal mixed oxides of spinel structure of general formula Li1+tM2-tO4-d.z=0-0.3;a, b and c=0-0.8;a+b+c=1;e=-0.1 to 0.1;d=0-0.4;t=0-0.4;M=manganese and or metals from groups 3-12 of the periodic table.While more than 60 mol.% of M is manganese and further M's, from which not more than 30 mol% is chosen, are metals from groups 3-12 of the periodic table.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The electrolyte composition contains at least one conducting salt different from the compound (I). The electrolyte composition contains at least one further additive. The electrolyte composition contains 60-99.98 wt.% of aprotic organic solvent, 0.01-25 wt.% of at least one conducting salt different from the compound (I), 0.01-25 wt.% of compound (I), and 0-10 wt.% of at least one further additive. Preferred Components: The aprotic organic solvent is selected from cyclic and noncyclic organic carbonates, which may be partly halogenated; di-1-10C-alkylethers, which may be partly halogenated; di-1-4C-alkyl-2-6C-alkylene ethers and polyethers, which may be partly halogenated; cyclic ethers, which may be partly halogenated; cyclic and acyclic acetals and ketals, which may be partly halogenated; orthocarboxylic acids esters, which may be partly halogenated; cyclic and noncyclic esters of carboxylic acids, which may be partly halogenated; cyclic and noncyclic sulfones, which may be partly halogenated; cyclic and noncyclic nitriles and dinitriles, which may be partly halogenated; and ionic liquids, which may be partly halogenated. The conducting salt (ii) is selected from Li(F6-xP(CyF2y+1)x); Li(B(R10)4), Li(B(R10)2(OR11O)) and Li(B(OR11O)2); salts of the general formula Li(X(CnF2n+1SO2)m); and LiClO4; LiAsF6; LiCF3SO3; Li2SiF6; LiSbF6; LiAlCl4, Li(N(SO2F)2), lithium tetrafluoro (oxalato) phosphate; and lithium oxalate. The further additives are selected 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 carbonates, sultones, cyclic and acyclic sulfonates, cyclic and acyclic sulfites, cyclic and acyclic sulfinates, organic esters of inorganic acids, acyclic and cyclic alkanes having a boiling point at 1 bar of at least 36 degrees C, and aromatic compounds, optionally halogenated cyclic and acyclic sulfonylimides, optionally halogenated cyclic and acyclic phosphate esters, optionally halogenated cyclic and acyclic phosphines, optionally halogenated cyclic and acyclic phosphites including, optionally halogenated cyclic and acyclic phosphazenes, optionally halogenated cyclic and acyclic silylamines, optionally halogenated cyclic and acyclic halogenated esters, optionally halogenated cyclic and acyclic amides, optionally halogenated cyclic and acyclic anhydrides, optionally halogenated organic heterocycles.x=0-6;y=1-20;R10=1-4C alkyl, 2-4C alkenyl, 2-4C alkynyl (all optionally substituted by OR12), F, Cl, Br or I;R12=1-6C alkyl, 2-6C alkenyl, or 2-6C alkynyl;m=1-3;X=O, S, N, P, C or Si;n=1-20.The (OR11O) is a bivalent group derived from 1 ,2- or 1 ,3-diol, from 1 ,2- or 1 ,3-dicarboxlic acid or from a 1 ,2- or 1 ,3-hydroxycarboxylic acid, where the bivalent group forms a 5- or 6-membered cycle via the both oxygen atoms with the central B-atom. Provided that:(1) when m is 1, then X is selected from O or S;(2) when m is 2, then X is selected from N or P; and(3) when m is 3, then X is selected from C or Si. Preferred Definitions:    R1-R4=CH3.    SPECIFIC COMPOUNDS - 14 Compounds are specified as compound (I) e.g. lithium 3-pyridyl trimethyl borate of formula (Ia), lithium 3-allyl trimethyl borate, lithium 3-propargyl trimethyl borate, 3-propionitrile trimethyl borate, and lithium trifluoroethyl trimethyl borate.    EXAMPLE - No suitable example given.