| abstract |
(57) [Summary] [Object] To provide a non-aqueous electrolyte secondary battery using a novel active material having improved charge-discharge characteristics and cycleability. [Structure] Chemical formula Lix My Gez Op (M is Co, M one or more transition metal elements selected from n and Ni, 0.9 ≦ x ≦ 1.3, 0.8 ≦ y ≦ 2.0, 0.01 ≦ z ≦ 0.2, 2.0 ≦ p ≦ 4.5), a lithium ion type non-aqueous electrolyte secondary battery comprising a positive electrode using a composite oxide as an active material, a negative electrode, and a non-aqueous electrolyte. |