Patent ID: 10547054

Abstract:
According to one embodiment, there is provided an active material. The active material includes a composite oxide having a monoclinic crystal structure and represented by a general formula of LiwNa2−xM1yTi6-zM2zO13+δ. In the general formula, M1 is at least one metallic element selected from the group consisting of Mg, Sr, Ca, Ba, Cs and K. M2 is at least one metallic element selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn and Al. The subscript w is within a range of 0≤w≤6. The subscript x is within a range of 0≤x<2. The subscript y is within a range of 0≤y<2. The subscript z is within a range of 0<z≤6. The subscript δ is within a range of −0.1≤δ≤0.1.