Effect of Mo-doped LiFePO 4 Positive Electrode Material for Lithium Batteries

Abstract

Mo-doped LiFePO4 was synthesized via co-precipitation method using sucrose as the carbon source. Structure, surface morphology, and the electrochemical properties of the synthesized olivine compounds were investigated using Rietveld refinement of X-ray diffraction data (XRD), scanning electron microscopy (SEM), and electrochemical charge-ischarge tests. Spherical morphology with the particle size of similar to 8 mu m authenticated the enhanced tap density and volumetric energy density of the synthesized materials. Charge-discharge behavior of LiFePO4 and Mo-doped LiFePO4 cells demonstrated a specific capacity of 130 and 145 mAh g(-1), respectively. Mo-doped LiFePO4 cells exhibited an excellent discharge capacity at 96 mAh g(-1) at 7 C-rate.