Research of Lithium Iron Phosphate as Material of Positive Electrode of Lithium-Ion Battery

摘要

In the present paper, samples of pure and doped lithium iron phosphate composite with the followingcomposition: LiFePO4/, Li0.99Fe0.98(CrNi)0.01PO4/ were synthesized. The samples were synthesizedusing the sol-gel method. According to the acquired data, all the obtained samples of lithium ironphosphate are crystallized in the orthorhombic modification of lithium iron phosphate with thestructure of olivine. The average particle size of the obtained materials varies in the range of 50-100nm. The carbon content was 4 wt%. The doping of lithium iron phosphate with trivalent cations ofchromium and nickel results in the increase of the discharge capacity at high discharge rates with thesimultaneous stability augmentation during the cycling.