NOVELTY - A lithium ion battery comprises anode, cathode containing a cathode active material chosen from lithium ion-containing transition metal compound, and electrolyte composition containing aprotic organic solvent (A), compound (B) chosen from lithium (bisoxalato) borate, lithium difluoro (oxalato) borate, lithium tetrafluoro (oxalato) phosphate, lithium oxalate, lithium (malonato oxalato) borate, lithium (salicylate oxalato) borate, lithium (tris oxalato) phosphate and dioxolone compound (I), phosphorus-containing compound (C) (IIa) or (IIb), and lithium salt (D).    USE - Lithium ion battery. Uses include but are not limited to mobile device, bicycles, aircraft, boats, ships, laptops, telephone, drill, battery-driven screwdriver, and battery-driven tacker.    ADVANTAGE - The lithium ion battery has excellent performance characteristics, high cycling stability.    DETAILED DESCRIPTION - A lithium ion battery comprises anode, cathode containing a cathode active material chosen from lithium ion-containing transition metal compounds having manganese content of 50-100 wt.% with respect to the total weight of transition metal in lithium ion-containing transition metal compound, and electrolyte composition containing aprotic organic solvent (A), and 0.01-5 wt.% compound (B) chosen from lithium (bisoxalato) borate, lithium difluoro (oxalato) borate, lithium tetrafluoro (oxalato) phosphate, lithium oxalate, lithium (malonato oxalato) borate, lithium (salicylate oxalato) borate, lithium (tris oxalato) phosphate and dioxolone compound of formula (I) with respect to total weight of the electrolyte, and 0.01-5 wt.% phosphorus-containing compound (C) of formula (IIa) or (IIb) with respect to total weight of the electrolyte, lithium salt (D) different from compound (B), and optionally contains additive (E).    R 1=H, or 1-4C alkyl;    R 2=H, 1-10C alkyl, 3-10C cycloalkyl, benzyl, or 6-14C aryl (all optionally substituted by F), 1-4C alkyl, phenyl, benzyl or 1-4C alkyl substituted by F;and    R 3-R 7=1-10C alkyl, 3-10C cycloalkyl, benzyl or 6-14C aryl (all optionally substituted by F), 1-4C alkyl, phenyl, benzyl or 1-4C alkyl substituted by F.    INDEPENDENT CLAIMS are included for:    (1) use of compound (B); and    (2) manufacture of lithium-ion battery.