Patent ID: 7811708

Claim:
A lithium-ion battery having a cathode that includes an active cathode material, the active cathode material comprising a cathode mixture that includes: a) a lithium cobaltate; and b) a manganate spinel represented by i) an empirical formula of Li (1+x1) (Mn 1-y1 A′ y2 ) 2-x2 O z1 where x1 and x2 are each independently equal to or greater than 0.01 and equal to or less than 0.3, y1 and y2 are each independently equal to or greater than 0.0 and equal to or less than 0.3, z1 is equal to or greater than 3.9 and equal to or less than 4.1, and A′ is at least one member of the group consisting of magnesium, aluminum, nickel and chromium, or ii) an empirical formula of Li (1+x1) Mn 2 O z1 where: x1 is equal to or greater than 0.01 and equal to or less than 0.3; and z1 is equal to or greater than 3.9 and equal to or less than 4.1, wherein the lithium cobaltate and the manganate spinel are in a weight ratio of lithium cobaltate:manganate spinel between about 0.9:0.1 to about 0.6:0.4.