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

Abstract

LiFePO4 material has many virtues, such as rich raw materials, low price, excellent high temperature cycling performance and safety property. Lithium ion battery with LiFePO4 as positive electrode active material is the most promising. However, compared with other positive electrode active materials, LiFePO4 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 LiFePO4/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 Land2001.