| abstract |
Provided is a positive electrode for a lithium secondary battery in which capacity deterioration during charging and discharging at a high potential is suppressed. A positive electrode for a lithium secondary battery according to the present invention has a general formula xLi [Li 1/3 M1 2/3 ] O 2. (1-x) LiM 2 O 2 (where M1 has an average oxidation state of 4+ M2 is at least one transition metal element: a solid solution compound represented by 0 <x <1), and a general formula LiNi 1-ab M3 a M4 b O 2 ( Here, M3 is Al and / or Mg, and M4 is at least one metal element selected from the group consisting of Co, Mn, Fe, Cu and Cr: 0.3 ≦ a ≦ 0.5, And a lithium nickel composite oxide having a layered structure represented by 0 ≦ b ≦ 0.2). [Selection] Figure 1 |