| abstract |
According to one embodiment, a battery active material is provided. The active material contains active material particles. The active material particles include a compound represented by the formula Ti 1-x M 1 x Nb 2-y M 2 y O 7 . This active material particle belongs to the peak A (003) plane appearing at 2? In the range of 23.74 to 24.14 占 attributed to the (110) plane in the X-ray diffraction pattern obtained by the X-ray diffraction method of the particles of the active material, A peak B at 2? In the range of 26.21 占 and a peak C at 2? In the range of 26.14 to 26.54 占 attributed to the (-602) plane. The intensity I A of the peak A , the intensity I B of the peak B , and the intensity I C of the peak C satisfy the relationship (1): 0.80 ≤ I B / I A ≤ 1.12; And relation (2): I C / I B ? 0.80. |