Research on the LiFe1-xMnxPO4 by self-propagating combustion synthesis
LI Hang1, CHEN Xiu-juan1，2, ZHANG Peng-lin1
1 Province-Ministry Funded State Key Lab on New Materials of Nonferrous Metals in Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China，2 School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Abstract：LiFePO4 was synthesized by thermal explosion with MnCO3 as Mn source. The effect of different amount of MnCO3 on the performance of LiFePO4 was studied. The results show that the peak intensity and half width of LiFe0.95Mn0.05PO4 diffraction peak are the best when the doping amount is x = 0.05; SEM test shows that the particles of the doping product are dispersed best and the particles are uniform; the first charge discharge specific capacity of the doping product at 0.1C is 154.9 mAh/g and 138.5 mAh/g respectively, which is higher than the first charge discharge specific capacity of pure LiFePO4; after 50 cycles, the discharge specific capacity is greatly improved. The first discharge specific capacity is 129 mAh/g, 109.4 mAh/g and 86.9 mAh/g at 0.2 C, 0.5 C and 1 C, respectively.
2020, Vol. 30 
