| abstract |
The object of the present invention provides a lithium transition metal silicate-based anode active substance material having excellent recirculation properties, and lower decrease in discharge capacity even through repeatedly charging and discharging. The present invention provides an anode active substance material characterized in that it has a lithium transition metal silicate with a mixed phase containing an orthorhombic structure having a symmetry of a space group Pmn2<sub>1</sub> and a monoclinic structure having a symmetry of space group P2<sub>1</sub>/n which is represented by a general formula Li2-yFe1-xMxSi1-yXyO4 (in which, M=at least one transition metal selected form the group consisting of Mn, Ti, Cr, V, Ni, Co, Cu, Zn, Al, Ge, Zr, Mo and W; X=at least one element selected form the group consisting of Ti, Cr, V, Zr, Mo, W, P and B; 0 ≤ x < 1, and 0 ≤ y < 0.25). |