Effect of particle size on electrochemical performance of lithium iron phosphate materials

Abstract LiFePO 4 material has many virtues, such as rich raw materials, low price, excellent high temperature cycling performance and safety property. Lithium ion battery with LiFePO 4 as positive electrode active material is the most promising. However, compared with other positive electrode active materials, LiFePO 4 material has the inherent disadvantage of poor electrical conductivity, it greatly limits its dynamic characteristics at low temperature. In this paper, the effect of particle size of LiFePO 4 /C material on the low temperature performance prepared via solid-state method is systematically investigated. The structure and morphology of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The electrochemical properties of cathode materials were studied by Land 2001.