ELECTRODE-ACTIVE ANION-DEFICIENT LITHIUM TRANSITION-METAL PHOSPHATE, METHOD FOR PREPARING THE SAME, AND ELECTROCHEMICAL DEVICE USING THE SAME

摘要

The present invention provides the electrode active materialof an anion-deficient lithium transition metal phosphate compoundexpressed by the chemical formula Li1-xM(PO4)1-y (0 = x =0.15, 0 y = 0.05). The invention provides a method for preparingLi1-xM(PO4)1-y comprising a step wherein a precursor for a lithium transitionmetal phosphate compound is generated; a step wherein the precursoris mixed under the reaction conditions including a temperatureof 200 700°C and a pressure of 180 550 bar to synthesize the anionicdeficient lithium transition metal phosphate compound; and a stepwherein the resulting product is calcined or granularized and then calcined.In addition, the invention provides an electrochemical devicethat uses Li1-xM(PO4)1-y as its electrode active material.