Abstract
Lithium manganese oxide (LiMn2O4) synthesized from manganese ore has been successfully applied for cathode materials of lithium-ion batteries. LiMn2O4 was obtained by reacting lithium carbonate (Li2CO3) and manganese oxide (MnO2) using a solid-state reaction. The structure characterization of LiMn2O4 was carried out using X-ray diffraction (XRD) and Raman spectroscopy. The thermal properties of cathode material were studied using Thermal Gravimetric Analysis (TGA). The electrochemical properties were analyzed using cyclic voltammetry (CV), charge-discharge (CD), and electrochemical impedance spectroscopy (EIS). Two pairs of redox peaks were identified at 3.0-4.5 V. The efficiency of the battery was 94.74% in the first cycle with maximum electrical conductivity of 5.26 x 10-4 S cm-1. It was concluded that LiMn2O4 synthesized from manganese ore can be applied as the cathode of lithium-ion batteries.
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