| abstract |
(57) [Problem] To provide a positive electrode active material capable of producing a non-aqueous electrolyte secondary battery excellent in cycle characteristics, storage characteristics, and discharge capacity when high-rate discharge is performed. SOLUTION: A lithium compound and a cobalt compound are represented by L A lithium-cobalt double oxide synthesized by granulating and firing a mixed powder mixed in a ratio of i / Co molar ratio of 0.98 to 1.005, and having a hexagonal type. In the powder X-ray diffraction pattern by CuKα ray, (003) The diffraction intensity I (003) of the crystal plane and (10 4) The ratio of the crystal plane to the diffraction intensity I (104) is 2.0 ≦ I (003) / I (104) ≦ 4.0. More preferably, 2.5 ≦ I (003) / I (104) ≦ 3. 5 As the lithium-cobalt double oxide, the variation width of the Li / Co molar ratio of each part of the mixed powder obtained by mixing the lithium compound and the cobalt compound is 0.04 or less, and more preferably 0.03 or less. |