| 摘要 |
The present invention relates to a method of manufacturing a lithium manganese composite oxide with excellent high temperature stability and high power as a positive electrode active material. The manufacturing method manufactures a lithium manganese composite oxide of chemical formula 1 by sintering lithium supplying precursors and manganese supplying precursors at a temperature of 700-900°C after mixing the lithium supplying precursors and manganese supplying precursors and is characterized by mixing MnO_2 and Mn_3O_4 as the manganese supplying precursors at a ratio of 9:1-1:9. Li_(1+x)Mn_(2-x-a-b)A_aB_bO_4 (Heteroatom A or B is at least one selected from the group consisting of Ni, Co, Al, Mg, Fe, Cr, Zr and Ti, respectively. 0<=x<=0.2, 0<=a<=0.15, 0<=b<=0.15). |
