| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode active material having a chemically stable structure and improved in capacity characteristics and life characteristics, and a lithium secondary battery.SOLUTION: A positive electrode active material includes a lithium-containing compound represented by the following chemical formula 1. LiFeMM'PO...Chemical formula 1 In the chemical formula 1, M represents vanadium (V), M' represents cobalt (Co), manganese (Mn), magnesium (Mg), zirconium (Zr), nickel (Ni), or a combination thereof, and 0<x<0.20, 0≤z<0.20 and 0.90≤y<1.20 are satisfied. |
