A low temperature barium-based ceramic oxide battery materials for high voltage lithium secondary cells

LiCo1−xBaxO2 (x = 0.0, 0.1, 0.2, 0.3 and 0.5) has been prepared by a low temperature solid-state reaction procedure and evaluated. It is used as the positive material for lithium-ion battery applications. Bare and doped samples were characterized by chemical analysis, X-ray diffraction, Transmission Electron Microscope, Scanning Electron Microscope and Energy-Dispersive X-ray Spectroscopic Analysis. Electrochemical characterization of these samples has been studied following cyclic voltammetry and galvanostatic charge–discharge cycling in between the potential range of 3.0–4.5 V. Specific capacity of the compound with x = 0.2 has been found to be about 164 mAh−1. With an increase in x, the capacity decreases and reaches to 121 mAhg−1 at x = 0.5. From cyclic voltammograms, it has been found that the peak potential separation is minimum for the sample with x = 0.2, which supports the charge–discharge data.