Electrochemical properties of Li4Mn5O12 used as electrode materials synthesized by hydrothermal method

Abstract

In this work, lithium manganese oxide (LMO) was successfully synthesized by hydrothermal method. The optimized conditions for LMO synthesis were investigated including molar ratio of precursors, hydrothermal/annealing temperature, calcination time, and so on. The structure, composition, and physical and electrochemical properties of the samples were determined via X-ray diffraction (XRD) technique, atomic absorption spectroscopy (AAS), and cyclic voltammetry (CV). The optimized synthesis conditions of LMO were obtained as follows: a molar ratio of Li:Mn = 4:3, the hydrothermal temperature of 120°C in 192 hours, and the annealing temperature of 500°C in 6 hours. The synthesized samples exhibited the excellent reversibility of Li+ intercalation/deintercalation in the Li-ion system. The high rate properties combined with the good charge storage of Li₄Mn₅O₁₂ show a high potential for supercapacitor applications.