Effect of vanadium doping on electrochemical properties of lithium iron manganese phosphate

Abstract The low-cost lithium iron manganese phosphate anode material has a 15% higher energy density than lithium iron phosphate, and it has received wide attention in recent years. However, the poor electronic/ionic conductivity of lithium ferromanganese phosphate leads to poor power performance, which makes it difficult to meet the needs of practical applications. In this study, a V-doped LiMn0.2Fe0.8PO4(LFMP) material is designed and prepared, and every particle is coated by a uniform carbon layer. The V-doped LFMP material shows better rate performance and cycle performance. When the optimal vanadium doping amount is 0.01, the specific discharge capacity of the material is 164.0 mAh/g at 0.1 C.