Materials Today: Proceedings | 2019
Synthesis and Study of Zirconium Doped Lithium Titanate Ceramics
Abstract
Abstract Lithium titanate has been used as anode materials for litium batteries. Lithium titanate with stoichiometric formula (Li4Ti5O12) was prepared by the solid state method followed by sintering of the material. Lithium oxide (Li2O) and Titanium Oxide (TiO2) were taken as a base material to prepare the sample. The anode materials should have better ionic mobility. To enhance the ionic mobility of Lithium Titanate, Zr+4 is incorporated in the titanum site of Lithium Titanate. Incorporated Zr+4 with stoichiometries formula Li4Ti5-xAxO12, with x = 0.1, 0.2 and 0.3 weight percent respectively was prepared. Differential thermal analyses (DTA) of the prepared green sample had shown that the reaction completes at around 500°C. Thus, calcinations of the sample was done at temperatures greater than 500°C for an hour to get the proper phase of Lithium Titanate. X-ray diffraction (XRD) of the pure sample was carried out. Monoclinic phase was found in the material . Crystallite size was found in nm. Pellets were sintered at varying temperature rang e.g. 900°C, 950°C, 1000°C, 1050°C and 1100°C with soaking time of one hour. The measurement of mobility of charge carrier was measured using impedance analyser. The electrical properties of the sample were correlated with microstructure. Scanning Electron Microscopy (SEM) of the sintered sample shown the clear grain and grain boundaries with grains are in μm size. Frequency dependent resistance of Li4Ti5-xZrxO12, where x= 0.1, 0.2 & 0.3 weight percent has been studied.