| abstract |
(57) [Summary] [Objective] To provide a novel non-aqueous electrolyte secondary battery with improved charge-discharge characteristics and cycleability. [Structure] In a secondary battery composed of a positive electrode, a negative electrode and a non-aqueous electrolyte, the positive electrode active material has a chemical formula of Lix Ay Mz Tim O p (A is one or more elements selected from Na and K, M is C one or more transition metals selected from o, Mn and Ni; 8 ≦ x ≦ 1.3, 0.01 ≦ y ≦ 0.2, 0.8 ≦ z ≦ 2.0, 0.01 ≤ m ≤ 0.2, 2.0 ≤ p ≤ 4.7) A non-aqueous electrolyte secondary battery comprising a complex oxide represented by: |