Electrode-active anion-deficient lithium transition-metal phosphate, method for preparing the same, and electrochemical device using the same

The present invention formula Li The invention, comprising the lithium-transition metal phosphate compound to produce a precursor; Wherein the precursor to a temperature 200 ~ 700 ℃, pressure of 180 ~ 550bar synthesizing reaction conditions by mixing water and a lack anion type lithium transition metal phosphate compound in the; It provides M Also, the present invention provides an electrochemical device using the