| abstract |
A positive electrode active material containing a compound represented by the following compositional formula (1), the compound having a crystal structure belonging to the space group Fm-3m. Li x Me y A z O α F β formula (1), wherein Me is selected from Mn, Co, Ni, Fe, Al, Cu, Nb, Mo, Ti, Cr, Zr, Zn, Na, K , Ca, Mg, Pt, Au, Ru, W, one or two or more elements, the A is one or more elements selected from B, Si, P, and the following conditions are met : 1.3≤x≤2.1, 0.8≤y≤1.3, 0<z≤0.2, 1.8≤α≤2.9, 0.1≤β≤1.2. |