Effect of Mo-doped LiFePO<sub>4</sub> Positive Electrode Material for Lithium Batteries

Oh, Seung-Min; Sun, Yang-Kook

doi:2012.3.4.172

J. Electrochem. Sci. Technol > Volume 3(4); 2012 > Article

Article

Journal of Electrochemical Science and Technology 2012;3(4):172-177.
DOI: https://doi.org/10.5229/JECST.2012.3.4.172

Effect of Mo-doped LiFePO₄ Positive Electrode Material for Lithium Batteries

Seung-Min Oh, Yang-Kook Sun

Department of Chemical Engineering, Hanyang University;Department of Energy Engineering, Hanyang University;

Abstract

Mo-doped $LiFePO_4$ 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 ${sim}8{mu}m$ authenticated the enhanced tap density and volumetric energy density of the synthesized materials. Charge-discharge behavior of $LiFePO_4$ and Mo-doped $LiFePO_4$ cells demonstrated a specific capacity of 130 and 145 mAh $g^{-1}$, respectively. Mo-doped $LiFePO_4$ cells exhibited an excellent discharge capacity at 96 mAh $g^{-1}$ at 7 C-rate.

Key Words: Co-precipitation, Doping, Electrochemical properties, Lithium-ion Battery, Olivine