| abstract |
Provided is a lithium titanate powder for an electrode of an electricity storage device, which has excellent input characteristics at an extremely low temperature. The invention relates to a lithium titanate powder mainly composed of Li 4 Ti 5 O 12, a specific surface area equivalent diameter and D BET, the crystallite diameter is taken as D X, 0.1 to the D BET a 0.6 .mu.m, D X is larger than 80 nm, the ratio D BET / D X of D BET and D X is 3 or less, M (where, M is selected Mg, Zn, Al, Ga, or in At least one metal element), the atomic concentration of M at a position of 5 nm from the surface of the particle is D1 (atm%) and the atomic concentration of titanium is Dti (atm%), and 100 nm from the surface of the particle. Lithium titanate powder for an electrode of an electricity storage device satisfying the formulas (I) and (II) where the atomic concentration of M at the position is D2 (atm%). D1 / D2 ≧ 5 (I), 0.02 ≦ D1 / Dti ≦ 0.4 (II) [Selection figure] None |