Effect of Doped Lithium and Thermal Treatments on the Structure and Conducting Properties of Perovskite Li_xCa_1-xTiO₃

Abstract

In this paper, we present a detailed study of the influence of the thermal treatments, doped lithium on the crystal structure of perovskite lithium-ion conductor Li_xCa_1-xTiO₃ (x=0-0.15), ionic conductivity and vibration behavior. These samples characterized by Differential Scanning Calorimetry (DSC), Raman scattering, X-Ray diffraction (XRD) and Complex impedance Spectroscopy (CIS). The results of Raman scattering have showed that Li⁺ ion was entering into the crystal lattice. A study of ionic conductivity by CIS implied that the conductivity of Li_xCa_1-xTiO₃ increased with the increase of substituted Li⁺ ions and reached a maximum value of about 3.8 × 10^-6 S/cm at x = 0.1, and then decreased for x > 0.1. [DOI: 10.1380/ejssnt.2012.255]