ACTIVE MATERIAL FOR SECONDARY BATTERIES

摘要

Provided is an active material for secondary batteries, which has improved lifetime properties. An active material for secondary batteries, comprising: a first active material represented by Lip[M1mM22-m-nM3n]O4 (wherein M1 represents at least one element selected from Ni, Cr, Fe, Co and Cu; M2 represents at least one element selected from Mn, Ti and Si, wherein Mn is contained in M2; M3 represents at least one element selected from Li, B, Mg, Al, Na and Ca; and 0 = p, 0 q[LiaXxZzMn1-a-x-z]O2 (wherein X represents at least one element selected from Ni, Cr, Fe, Co and Cu; Z represents at least one element selected from Al, Mg, B, Si, Na, Ca and Ti; and 0 = q, 0 < a, 0 < x, 0 = z, and a+x+z < 1).