| 摘要 |
The present invention provides a metal oxide for a cathode active material of a lithium secondary battery that has structural thermal stability improved, has a high rate, a high capacity, excellent cycle properties and excellent lifetime properties, and is represented by chemical formula 1. [chemical formula 1] Li_aNi_xCo_yM_zO_2 wherein M is one selected from among aluminum, gallium and indium, and a, x, y and z satisfy that 1.01<=a<=1.05, 0.7<=x<=0.9, 0<=y<=0.17, 0.02<=z<=0.16 and x+y+z=1. |
