Patent ID: 8187752

Claim:
A lithium ion secondary battery comprising: a first current collector, a positive electrode comprising a positive electrode active material, and a binder, a second current collector, a negative electrode comprising a first lithium intercalating composition comprising graphitic carbon, graphite, synthetic graphite, hard carbon, mesophase carbon, coke or a combination thereof, an electrolyte comprising lithium ions, and a separator between the positive electrode and the negative electrode, the battery having a discharge energy density of at least about 240 Wh/kg when discharged from 4.6V to 2.0V, wherein the positive electrode active material comprises a second lithium intercalation composition with a specific capacity of at least about 225 mAh/g at the 10 th cycle when discharged from 4.6V to 2.0V at a rate of C/3, wherein the second lithium intercalation composition is represented by a formula of Li 1+x Ni α Mn β Co γ M″ δ O 2 , where x ranges from about 0.05 to about 0.25, α ranges from about 0.1 to about 0.4, β ranges from about 0.4 to about 0.65, γ ranges from about 0.05 to about 0.3, and δ ranges from about 0 to about 0.1, and where M″ is Mg, Zn, Al, Ga, B, Zr, Ti, Ca, Ce, Y, Nb or combinations thereof and has an inorganic coating, wherein the density of the positive electrode is at least about 2.5 g/mL, wherein the positive electrode has at least about 92 weight percent active material and wherein the negative electrode has a thickness from about 65 microns to about 200 microns on the second current collector.