Effect of calcination temperature on electrochemical performances of LiFePO₄/C cathode material

Abstract

Phase pure, monoclinic and nanostructured LiFePO4/C composites have been synthesised via rheological phase method at different temperatures and characterised by X-ray diffraction, thermogravimetry and SEM. The electrochemical measurements showed that calcination temperatures have great influence on the electrochemical performances of LiFePO4/C composite as the cathode materials for Li ion batteries. When the calcination temperature was 650°C, the LiFePO4/C composite showed high capacities and good cyclabilities with the discharge capacities still reaching 151.3 mA h g− 1 after 50 charge–discharge cycles. It shows that the properly chosen temperature was significant for LiFePO4/C composite with good electrochemical performance for Li ions batteries application.