Patent ID: 11888121
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. The secondary battery according to claim 1, wherein the negative electrode comprises at least one of a monoclinic niobium-titanium composite oxide represented by LixTi1−yM1yNb2−zM2zO7+δ (where M1 is at least one selected from the group consisting of Zr, Si, and Sn, M2 is at least one selected from the group consisting of V, Ta, and Bi, 0≤x<≤5, 0≤y<1, 0≤z<2, and −0.3≤δ≤0.3) and a monoclinic niobium-titanium composite oxide represented by LixTi1−yM3y+zNb2−zO7−δ (where M3 is at least one selected from the group consisting of Mg, Fe, Ni, Co, W, Ta, and Mo, 0≤x≤5.0≤y≤1, 0≤z<2, and −0.3≤δ≤0.3).