| 摘要 |
The main object of the present invention is to provide a positive electrode active material for a lithium secondary battery with high theoretical capacity. The present invention provides a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material has a crystal structure belonging to a space group C12/c1, and is represented by {Na_(1-α)Li_α}_xM_1-yN_y(PO_4)_z. (Alpha is greater than or equal to 0.5 and less than or equal to 1; x is greater than or equal to 2.5 and less than or equal to 3.5; y is greater than or equal to 0 and less than or equal to 0.5; and z is greater than or equal to 1.5 and less than or equal to 2.5. In addition, M is at least one of V and Fe, and N is at least one of Co, Ni and Mn.) |
