Patent ID: 9054374
Filing Date: 2015-06-09
Classification: B05D,C01G,C01P,H01M,Y02E

Abstract:
1. A cathode active material comprising: a lithium complex oxide including lithium (Li) and at least one kind selected from the group consisting of cobalt (Co), nickel (Ni) and manganese (Mn); and a surface layer formed on a central section of the lithium complex oxide, said surface layer including lithium (Li) PO wherein as the lithium complex oxide, at least one kind selected from the group consisting of compounds represented by Chemical Formulas 1, 2 and 3 is included: (where M1 represents at least one kind selected from the group consisting of nickel (Ni), manganese (Mn), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), chromium (Cr), iron, copper (Cu), zinc (Zn), molybdenum (Mo), tin (Sn), calcium (Ca), strontium (Sr), tungsten (W), zirconium (Zr) and silicon (Si), the values of x, a, b and c are within ranges of 0.8≦x≦1.2, 0.8≦a≦1, 0≦b≦0.2 and −0.1≦c≦0.2, respectively); (where M2 represents at least one kind selected from the group consisting of cobalt, manganese, magnesium, aluminum, boron, titanium, vanadium, chromium, iron, copper, zinc, molybdenum, tin, calcium, strontium, tungsten, zirconium and silicon, the values of y, d, e and f are within ranges of 0.8≦y≦1.2, 0.3≦d≦0.98, 0.02≦e≦0.7 and −0.1≦f≦0.2, respectively); (where M3 represents at least one kind selected from the group consisting of cobalt, nickel, magnesium, aluminum, boron, titanium, vanadium, chromium, iron, copper, zinc, molybdenum, tin, calcium, strontium and tungsten, the values of z, g and h are within ranges of 0.8≦z≦1.2, 0≦g<1.0 and −0.2≦h≦0.2, respectively).