SYNTHESIS OF LIFEPO4 UNDER HYDROTHERMAL CONDITIONS

摘要

The present invention relates to a process for the preparation of a compound of formula (I) (A) at least one lithium containing compound, at least one iron containing compound having an oxidation number of iron of +3, and at least one M ¹ containing compound, if present, and / or at least one M ² containing compound, and / Providing a mixture comprising at least one M ³ containing compound and at least one reducing agent oxidized to at least one compound comprising at least one phosphorus atom of oxidation number +5, and (B) reducing the Fe to an oxidation number of +2 by heating the mixture obtained in step (A) at a temperature of 100 to 500 DEG C and a magnetic pressure to obtain a compound of formula (I) RTI ID = 0.0 : / RTI & Li _ab M ¹_b Fe _1-c M ²_c P _de M ³_e O _x (I) Wherein, The oxidation number of Fe is +2, M ¹ : Na, K, Rb and / or Cs, M ² : Mn, Mg, Al, Ca, Ti, Co, Ni, Cr, V, M ³ : Si, S, F, a: 0.8 to 1.9, b: 0 to 0.3, c: 0 to 0.9, d: 0.8 to 1.9, e: 0 to 0.5, x: 1.0 to 8, depending on the amount of Li, M ¹ , M ² , P and M ³ and the oxidation number.