Preparation of LiTi₂O₄ as a Lithium-ion Battery Anode by a Carbon-thermal Reduction Method

摘要

The anode material LiTi2O4 was successfully synthesized by a carbon-thermal reduction method. The standard Gibbs free energy of formation of LiTi2O4 is estimated by bond enthalpy, and the thermodynamics of the carbon-thermal reaction are calculated. The microstructure of the LiTi2O4 sample is obtained by scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the as-prepared LiTi2O4 has a spinel structure (space group Fd3m) and that the average particle size is approximately 0.4-1.2 μm. LiTi2O4 shows excellent electrochemical performance in terms of galvanostatic charge/discharge tests, specific capacity and cycling performance. Electrochemical measurements indicate that the symmetrical redox peaks are observed at approximately 1.52 V, and the reversible capacity is approximately 135.9 mAh/g at a rate of 0.2 C.