| 摘要 |
A cathode active material is provided which has a charge and discharge capacity larger than that of FeF3 when used in a non-aqueous electrolyte secondary battery. The cathode active material for use in secondary batteries with a non-aqueous electrolyte includes an amorphous metal fluoride represented by a general formula Fe(1-x-ny)NaxMyF(3-2(x+ny)), wherein M is a metal element selected from a group consisting of Co, Ni, Cu, Mg, Al, Zn, and Sn, n represents an oxidation number of the metal element M, 0<x≦0.4, and 0≦y≦0.1. |
