212th ECS Meeting, Abstract #158, © The Electrochemical Society Optimization of Heating Condition for Solid-State Synthesis and Electrochemical Performance of Doped LiFePO4 Cathode Materials

Olivine-LiFePO4 has orthorhombic crystalline phase with space group Pmnb. It is hexagonally close packed arrangement and the crystal skeleton consists of FeO6 octahedra and PO4 tetrahedra. The strong inductive effect of the PO43- polyanion moderates the Fe2+/Fe3+ redox couple to generate the relatively high operating potential as 3.4 V vs. Li/Li+ and the electrochemical charge/dis-charge potential profile is very flat. On the other hand, the separation of the chain of FeO6 edge-shared octahedral contributes extremely low electronic conductivity, leading to poor rate capacity. This limitation has been overcome through various methods as coating particles with carbon and doping with materials, etc. Particularly, doped-LiFePO4 with metal ions is known to bring about an enhancement of the high current rate performance as wel