| 摘要 |
Disclosed are a positive electrode active material, which is represented by chemical formula 1 and includes about 3-10 mol% of chromium, a positive electrode for a lithium secondary battery including the same, and a lithium secondary battery including the positive electrode. Chemical formula 1 represents xLi_2MnO_3-(1-x)Li_yNi_aMn_bCo_cM_dO_2. In chemical formula 1, inequalities of 0 < x <= 0.8, 0.7 <= y <= 1.3, 0 < a <= 0.5, 0 < b <= 0.8, 0 < c <=0.5, and 0 <= d <= 0.20 are satisfied; and M is at least one metal selected from the group consisting of titanium (Ti), vanadium (V), iron (Fe), copper (Cu), aluminum (Al), magnesium (Mg), zirconium (Zr), and boron (B). |
