2019 Volume 56 Issue 3 Pages 117-122
LiFePO4 has attracted attention as a promising cathode material for lithium ion battery, because it consists of abundant elements. However, the battery performance of this material is limited by its low electron conductivity and low lithium ion diffusion rate. Coating its surface with an electronically conductive material, such as carbon, is one of the major methods to overcome this issue. In this study, we tried to synthesize Au nanoparticles (NPs) on the surface of carbon-coated LiFePO4 (LiFePO4/C) using sonochemical reaction to further enhance the electron conductivity. The size of Au NPs deposited on the surface of LiFePO4/C changed in relation to the concentration of Au ions. The battery performance of the Au NPs-deposited LiFePO4/C, as evaluated at a high constant current rate of 20 C, showed an improvement in the polarization and discharge capacity of LiFePO4/C.
