Synthesis of LiFePO4/C by solid–liquid reaction milling method

LiFePO4/C was synthesized by the method of solid–liquid reaction milling, using FeCl3·6H2O, Li2CO3 and (NH4)2HPO4 and glucose, which was used as reductant (carbon source). The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), TG-DTA analysis, infrared absorption carbon–sulfur analysis and electrochemical performance test. The sample synthesized at 680 °C for 8 h showed, at initial discharge, a capacity of 155.8, 153.2, 148.5, 132.7 mAh g− 1 at 0.2 °C, 0.5 °C, 1 °C and 3 °C rate respectively. The sample also showed an excellent capacity retention as there was no significant capacity fade after 10 cycles.

The reaction between solid material and the liquor may be induced during milling under the mechanochemical effect. LiFePO4/C could be prepared by the method of solid-liquid reaction milling. The LiFePO4/C heated at 680 °C exhibits highest capacoty(155.8 mAh/g).Figure optionsDownload as PowerPoint slide