热处理对非注液/注液磷酸铁锂正极材料结构及浸出的影响OA

Based on the uninjected and impregnated LiFePO4 cathode materials as raw materials,the effects of heat treatment on the crystal structures and acid leaching behaviors of two types of cathode materials are systematically investigated in this paper.The results demonstrate that oxygenated heat treatment readily disrupts the lattice structure of cathode materials,generating the insoluble Li3Fe2(PO4)3 and inhibiting lithium leaching.Inert pyrolysis preserves the structural integrity of non-injected cathode materials and enhances material wettability,improving the separation efficiency of each component.Additionally,inert pyrolysis has no impact on the leaching rate of lithium of impregnated cathode materials,but leads to the generation of Fe2P2O7.