| 摘要 |
The present invention relates a cathode active material characterized in that a lithium compound, which is elecrochemically inactive, exists less than 0.15 weight% compared to the weight of lithium oxides in the outside of the a first lithium transition metal oxide represented by Chemical formula 1, which is electrochemically active; and a manufacturing method thereof. Li[Li_aNi_xMn_yCo_wM_z]O_(2-t)A_t (1) In Chemical formula 1, 0<=a<=0.2, 0<=x<=0.9, 0<=y<=0.9, 0<=w<=0.9, 0<=z<=0.9, a+x+v+w+y+z=1, 0<=t<0.2; M is at least one metal or transition metal cation having +2 to +4 oxidation number; and A is -1 or -2 valent anion. |
