| abstract |
A lithium titanate powder comprising Li 4 Ti 5 O 12 as a main component, wherein the specific surface area equivalent diameter calculated from the specific surface area determined by the BET method is defined as D BET and the peak half width of the (111) plane of Li 4 Ti 5 O 12 characterized in that the crystallite from when the diameter D X, D, and BET is 0.1~0.6㎛, X D is large, and D X D BET BET ratio D / D X is 3 or less than 80nm calculated by the equation of Scherrer Lithium titanate powder for electrodes of an electric storage device, an active material material containing the lithium titanate powder, and a battery device using the active material. |