Preparation and characterization of nano-LiFePO_4/C using two-fluid spray dryer

摘要

Nano-LiFePO_4/C materials were synthesized by two-fluid spray-drying using FeP0_4?2H_20, LiOH?H_2O as raw materials. The morphology， physigal and electrochemical properties of the LiFePO_4/C were tested and analyzed. The morphology of the synthesis LiFeP04/C was spherical and its aggregated particle size was smaller than lOμm, primary particle size was smaller than 200nm, the tap density of the material up to 1.25g/cm~3. The LiFeP04/C had an initial discharge specific capacity of 163.3mAh/g at 0.1C and its specific capacities were 147.7mAh/g and 121.8mAh/g at 1C and 5C, respectively. The initial charge/discharge efficiency reached 96.6%. Under low temperature 253K, the discharge capacity is 59.6% of that at 298K with 0.2C.