Structural, Morphological and Vibrational Studies of Magnesium Doped Lithium Titanate Anode Materials for Li-Ion Batteries

Abstract

In the present paper, we study the results of the substitution of Mg2+ in Li4Ti5O12 anode materials with the chemical composition of Li4-xMgxTi5O12 with x = 0, 0.1 and 0.3. Spinel structured Li4-xMgxTi5O12 materials are prepared by conventional ceramic method. The structural, morphological, chemical compostion and vibrational studies of the prepared anode samples are systematically characterized by thermal analysis, XRD, SEM, EDS and FT-IR. Phase formation is confirmed by thermal analysis followed by the XRD and FT-IR spectroscopic results. The X-ray diffraction (XRD) technique exposed that the materials belonged to spinel type having the space group as Fd-3m. Synthesized samples are quite large upto 0.98 to 1.3 ?m in diameter and the grain size had a wide distribution range. EDS is used to identify the elements. The FT-IR spectra show tetrahedral and octahedral sites to be inhabited by the MO6 oxide lattice.