High purity lithium iron phosphate/carbon composites prepared by using secondary lithium source

摘要: Abstract Various lithium salts including carbonate, hydroxide, acetate and citrate were used as secondary sources for the synthesis of iron phosphate/carbon composites with cheap in form Fe FePO4. Samples characterized by X-ray diffraction, scanning electron microscopy, cyclic voltammetry constant-current charge–discharge tests. The results showed that carbonate derived product generated a high purity LiFePO4 phase tap densities. Furthermore, satisfactory electrochemical performance an initial discharge capacity 146.1 mAh g− 1 at 0.5 C rate good retention 95.2% after 50 cycles achieved.