NOVELTY - The lithium ion secondary battery (100) comprises a positive electrode (104) comprising a positive electrode active material and a binder, a negative electrode (102) comprising a first lithium intercalating composition, an electrolyte comprising lithium ions, and a separator (106) between the positive electrode and the negative electrode. The battery has a volumetric discharge energy density of 250-550 Wh/kg when discharged from 4.6 V to 2 V. The positive electrode active material comprises a second lithium intercalation composition.    USE - The lithium ion secondary battery is useful in power tools, cellular phones, laptop computers, MP3 players and televisions, transportation devices such as automobiles and fork lifts, electric vehicles and plug in hybrid electric vehicles.    ADVANTAGE - The lithium ion secondary battery has high total energy, energy density and specific discharge capacity upon cycling at room temperature and at a moderate discharge rate.    DETAILED DESCRIPTION - The high energy lithium ion secondary battery (100) comprises a positive electrode (104) comprising a positive electrode active material and a binder, a negative electrode (102) comprising a first lithium intercalating composition, an electrolyte comprising lithium ions, and a separator (106) between the positive electrode and the negative electrode. The battery has a volumetric discharge energy density of 250-550 Wh/kg when discharged from 4.6 V to 2 V. The positive electrode active material comprises a second lithium intercalation composition. The positive electrode comprises the positive electrode active material (92 wt.%), electrically conductive agents (0.1-5 wt.%) that are distinct from the second lithium intercalation composition and polymer binder (0.5-7.9 wt.%) having an average molecular weight of 800000 atomic mass unit. An optional fluorine dopant is replaced up to 1 atomic percent of the oxygen in the composition. A density of the positive electrode is 2.5 g/ml. The negative electrode has a thickness of 65-200 microns on a single side of a current collector. The negative electrode comprises graphite, synthetic graphite, hard carbon, graphite coated metal foil and/or coke. The electrically conductive material comprises graphite, carbon black, metal powders and/or metal fibers. The battery comprises electrodes with each polarity separated by separators within a prismatic and cylindrical shaped casing. The electrodes and separators are stacked, jelly-rolled, or folded inside the casing. The casing comprises a polymeric film, a metallic foil and/or a metal. An INDEPENDENT CLAIM is included for a method for forming a lithium ion secondary battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a lithium ion secondary battery.    Battery (100)    Negative electrode (102)    Positive electrode (104)    Separator (106)    Current collectors. (108, 110)