| 摘要 |
In general, according to one embodiment, there is provided an active material. The active material contains a composite oxide having an orthorhombic crystal structure. The composite oxide is represented by a general formula of Li 2+w Na 2-x M1 y Ti e-z M2 z O 14+´ . In the general formula, the M1 is at least one selected from the group consisting of Cs and K; the M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al; and w is within a range of 0 ‰¤ w ‰¤ 4, x is within a range of 0 < x < 2, y is within a range of 0 ‰¤ y < 2, z is within a range of 0 < z ‰¤ 6, and ´ is within a range of -0.5 ‰¤ ´ ‰¤ 0.5. |
