Patent ID: 8828605

Claim:
A lithium-ion battery having a cathode that includes an active cathode material, the active cathode material comprising: a) a mixture that includes i) at least one of a lithium cobaltate and a lithium nickelate, wherein the lithium cobaltate is a modified lithium cobaltate, having a lithium modifier and, optionally, a cobalt modifier of the lithium cobaltate, and wherein the lithium modifier is magnesium (Mg), and wherein the cobalt modifier is at least one member of the group consisting of manganese (Mn), aluminum (Al), boron (B), titanium (Ti), magnesium (Mg), calcium (Ca) and strontium (Sr), and wherein the lithium nickelate is selected from the group consisting of Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 ; a lithium nickelate that includes at least one Li atom modifier selected from the group consisting of barium, magnesium, calcium and strontium; and a lithium nickelate represented by an empirical formula of Li x3 Ni (1−z3) M′ z3 O 2 coated with LiCoO 2 as a gradient coating or a spot-wise coating where: x3 is greater than 0.05 and less than 1.2, z3 is greater than 0 and less than 0.5, and M′ is at least one member of the group consisting of cobalt, manganese, aluminum, boron, titanium, magnesium, calcium and strontium; and ii) at least one of a manganate spinel and an olivine compound, wherein the manganate spinel is represented by an empirical formula of Li (1+x1) (Mn 1−y1 A′ y1 ) 2−x1 O z1 where: x1 is equal to or greater than 0.01 and equal to or less than 0.3, y1 is 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, cobalt, nickel and chromium, and wherein the olivine compound is represented by an empirical formula of Li (1−x2) A″ x2 MPO 4 where: x2 is equal to or greater than 0.05 and equal to or less than 0.2, or x2 is equal to or greater than 0.0 and equal to or less than 0.1 M is at least one member of the group consisting of iron, manganese, cobalt and magnesium, and A″ is at least one member of the group consisting of sodium, magnesium, calcium, potassium, nickel and niobium; or b) a mixture that includes i) a lithium nickelate selected from the group consisting of Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 ; a lithium nickelate that includes at least one Li atom modifier selected from the group consisting of barium, magnesium, calcium and strontium, and a lithium nickelate represented by an empirical formula of Li x3 Ni (1−z3) M′ z3 O 2 coated with LiCoO 2 as a gradient coating or a spot-wise coating where: x3 is greater than 0.05 and less than 1.2, z3 is greater than 0 and less than 0.5, and M′ is at least one member of the group consisting of cobalt, manganese, aluminum, boron, titanium, magnesium, calcium and strontium; and ii) a manganate spinel represented by an empirical formula of Li (1+x7) Mn 2−y7 O z7 where x7 and y7 are each independently equal to or greater than 0.0 and equal to or less than 1.0; and z7 is equal to or greater than 3.9 and equal to or less than 4.2.