Characteristics of Li_0.98Cu_0.01FePO₄ prepared from improved co-precipitation

Pure lithium iron phosphates and stoichiometric Cu-doped lithium iron phosphates were synthesized via improved co-precipitation, followed by sintering at high temperature for crystallization. The improved co-precipitation process allowed the homogeneous mixing of the ingredient reactants at atomic level. All samples were pure single phase indexed with orthorhombic Pnmb space group. The particle size of the Li_0.98Cu_0.01FePO₄ was drastically fine with100-200 nm, compared with the undoped LiFePO₄. The electrochemical performance of Li_0.98Cu_0.01FePO₄, including reversible capacity, cycle number and charge-discharge characteristics, exhibited better than those of LiFePO₄.