Study of Rapid Synthesis on LiFePO<sub>4B</sub> and LiFePO<sub>4B</sub>/C by Molten Salt Method and its Electrochemical Properties as Cathode Material

The LiFePOB4B and LiFePOB4B/C cathode materials were rapidly synthesized by molten salt method, where a KCl-MgClB2B eutectic salt was used as reaction media of the formation of LiFePOB4B and a relatively low synthesis temperature was adopted. X-ray diffraction (XRD) patterns of both samples were identified to orthorhombic olivine LiFePOB4B without obvious impurities. The LiFePOB4B was observed to micron-sized cuboid structure and the LiFePOB4B/C with nano-carbon layers had particle size distribution from nanometers to 3 μm by morphological characterization. The electrochemical results showed that the LiFePOB4B/C deliverd a larger discharge capacity than the LiFePOB4B did due to the conductive carbon improving the electrchemical activities of the materials and providing a high LiP+P transfer kinetics.