LiMn1.4Ni0.4Co0.2O4 spinel as a convenient cathode material for high voltage lithium ion batteries

To compare the effect of the annealing and testing temperature, LiMn_1.4Ni_0.4Co_0.2O₄ spinel material was synthesized with the combustion method using the sucrose as fuel followed by an annealing at three different temperatures 700°C, 800°C and 900°C. The electrochemical properties were investigated both at room temperature and 55°C under different electrochemical rate. The spinel sample was characterized by XRD analysis and no impurities were detected. The material annealing at 700°C shows a remarkable electrochemical performance. It exhibits a good reversible capacity of 120mAh/g and capacity retention of 97% at C/2.