Lithium ion batteries with high capacity anode active material and good cycling for consumer electronics

A lithium ion battery comprising a positive electrode comprising lithium cobalt oxide, a negative electrode comprising a silicon based active material, a separator between the positive electrode and the negative electrode, supplemental lithium and an electrolyte comprising lithium ions, wherein the supplemental lithium is present in an amount to compensate for 110% to 170% of the negative electrode first cycle irreversible capacity loss, wherein the silicon based active material generally has a specific capacity from 800 mAh/g to 2500 mAh/g at a rate of C/3 when cycled from 1.5 V to 0.005 V against lithium, wherein the lithium ion battery has a balance of negative electrode capacity relative to the sum of positive electrode capacity and supplemental lithium from 1.1 to 1.7 and wherein the lithium ion battery has a 150th cycle discharge capacity at a discharge rate of C/3 discharged from 4.35 V to 2.75 V that is at least 80% of the 5th cycle discharge capacity at a discharge rate of C/3 discharged from 4.35 V to 2.75 V, and wherein the negative electrode has an active material loading from 1.5 mg/cm2 to 8 mg/cm2 wherein the battery exhibits a volumetric energy density at least 550 Wh/1;

• wherein the lithium ion battery has a balance of negative electrode capacity relative to the sum of positive electrode capacity and supplemental lithium from 0.95 to 1.4, wherein the battery has a volume from 500 mm3 to 100,000 mm3, and wherein the battery exhibits a volumetric energy density at least 525 Wh/1 at a rate of C/10 discharged from 4.35 V to 2.75 V.