| abstract |
The present invention relates to an active material in the production of a Li-based battery,n n n Crystalline nanometric powdery materials of the formula Li x (M, M ') PO 4 , in particular Li x FePO 4 (0≤x≤1), are disclosed, which are used as a cathode material in Li-based batteries. It shows a single-phase Li insertion / extraction mechanism at room temperature, and a novel gradient charge / discharge voltage curve is obtained with the new material compared to the conventional LiFePO 4 , very simple to monitor the state of charge of the battery, Fe (ie Fe III) / Fe II ) increases the electronic conductivity in the room temperature single-phase Li x FePO 4 material compared to the state of conventional two-phase materials due to the coexistence of mixed valence states in the Along with the monomodal size distribution, it contributes to the exceptional high-efficiency capacity described in the battery. |