Effect of Particle Size of Li3PO4 on LiFePO4 Cathode Material Properties Prepared by Hydrothermal Method

Abstract

LiFePO4 is one of the most widely used cathode materials for lithium ion batteries. LiFePO4 prepared by hydrothermal method has the advantages of good consistency, small particle size, controllable morphology and accurate chemical ratio. In this paper, LiFePO4 was prepared by hydrothermal method, and the effect of particle size of Li3PO4 as reaction raw material was studied. It is found that the particle size of Li3PO4 could affect the morphology and properties of LiFePO4. Among the samples, the porous spherical structure of LiFePO4 particles can be obtained by using 2 μm Li3PO4, which is assembled from nanoparticles. This LiFePO4 has the best comprehensive performance and high vibration density.