| 摘要 |
PURPOSE: A mixed positive electrode active material is provided to quickly activate layered lithium manganese oxide and to stably utilize 3V region of lithium manganese oxide with spinel structure, thereby capable of providing a battery with higher charging and discharging capacity and excellent thermal stability. CONSTITUTION: A mixed positive electrode active material comprises layered lithium manganese oxide represented by chemical formula 1: Li_(1+y)Mn_(2-y-z)M_zO_(4-x)Q_x, and layered lithium manganese oxide represented by chemical formula 2: Li_2M_xMn_(1-x)O_3. In chemical formula 1, 0<=X<=1, 0<=y<=0.34, 0<=z<=1, M is one or more elements selected from Mg, Al, Ni, Co, Fe, Cr, Cu, B, Ca, Nb, Mo, Sr, Sb, W, B, Ti, V, Zr and Zn, Q is one or more elements selected from N, F, S and Cl. In chemical formula 2, 0<=x<=0.2, M is one or more selected from Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti and Bi. |
