| 摘要 |
An active material for a secondary battery whose lifetime characteristics are improved is provided. The active material for a secondary battery includes a first active material represented by Lip[M1mM22-m-nM3n]O4, wherein M1 is at least one selected from Ni, Cr, Fe, Co, and Cu; M2 is at least one selected from Mn, Ti, and Si, and contains Mn; M3 is at least one selected from Li, B, Mg, Al, Na, and Ca; and 0≦̸p, 0<m, 0<n, and m+n<2; and a second active material represented by Liq[LiaXxZzMn1-a-x-z]O2, wherein X is at least one selected from Ni, Cr, Fe, Co, and Cu; Z is at least one selected from Al, Mg, B, Si, Na, Ca, and Ti; and 0≦̸q, 0<a, 0<x, 0≦̸z, and a+x+z<1. |
