| abstract |
A non-aqueous electrolyte secondary battery having both excellent discharge capacity and thermal stability is provided. A positive electrode containing a metal oxide having a composition represented by the following formula (1), a negative electrode, and a non-aqueous electrolyte are provided. Li 2- x M 1- y M'y X z AO 4 (1) Here, M is at least one element selected from the group consisting of Ti, Nb, Mo, Ta and W, and M ′ is V, Cr, Mn, Re, Fe, Co, Ni, Ru, Rh, X is at least one element selected from the group consisting of Pd, Os, Ir, Pt, Cu, Ag and Au, X is at least one of O and F, and A is Si, Ge, P And S are at least one element selected from the group consisting of x, y and z, respectively, where 0 ≦ x ≦ 2, 0 ≦ y ≦ 0.5, and 0.5 ≦ z ≦ 1.5. [Selection diagram] Fig. 1 |