Preparation of LiMn_2O_4 Microstructure by Low Temperature Solid-State Reaction for Cathode Material

摘要

This study aims at investigating a better condition of calcination at different temperature to produce LiMn_2O_4 microstructure. In this study, cubic LiMn_2O_4 was synthesized using a low temperature solid-state reaction. We report, here, MnO_2 nanorods synthesis by reflux and their chemical conversion to LiMn_2O_4. The compound was characterized by XRD and TEM. Further, the analysis of LiMn_2O_4 microstructure was carried out by Direct Method using winPLOTR package program and Diamond using XRD data. At low calcination temperature, Mn_2O_3 is present as an impurity, but it disappears along with the increase in calcination temperature. It is also found that solid state reaction at is 750°C give nano-LiMn_2O_4. The lattice parameters and cell volumes of LiMn_2O_4 increases with the increase in heating temperature.