| 摘要 |
An active material for a secondary battery with improved life characteristics is provided. An active material for a secondary battery according to this exemplary embodiment is an active material for a secondary battery represented by Li a1 (Ni x1 Mn 2-x1-y1-z1 M1 y1 M2 z1 )O 4 wherein 0 < x1, 0 < y1, 0 < z1, x1 + y1 + z1 < 2, and 0 ‰¤ a1 ‰¤ 2; M1 is at least one selected from Si and Ti; and M2 is at least one selected from Li, B, Mg, Na, K, and Ca. In addition, an active material for a secondary battery according to this exemplary embodiment is an active material for a secondary battery represented by Li a2 (Ni x2 Mn 2-x2-y2-z2 M3 y2 M4 z2 )O 4 wherein 0 < x2, 0 < y2, 0 < z2 < 0.03, x2 + y2 + z2 < 2, and 0 ‰¤ a2 ‰¤ 2; M3 is at least one selected from Si and Ti; and M4 is at least one selected from Li, B, Mg, Al, Na, K, and Ca, and includes at least Al. |
