abstract |
According to one embodiment, an active material is provided. This active material is represented by the general formula of Li(2+x)Na2Ti6O14, wherein x is within a range of 0≤x≤6. The active material includes at least one element selected from the group consisting of Zr, Mo, W, V, Nb, Ta, P, Y, Al, Fe, and B in a content of 0.03 to 8.33 atom %. |