Patent ID: 8506847

Claim:
A process for producing a compound according to general formula (I) (I) Li a-b M 1 b V 2-c M 2 c (PO 4 ) x (I) wherein M 1 , M 2 , a, b, c and x have the following meanings: M 1 : Na, K, Rb and/or Cs, M 2 : Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg and/or Sc, a: 1.5-4.5, b: 0-0.6, c: 0-1.98 and x: number to equalize the charge of Li and V, and M 1 and/or M 2 , if present, wherein a-b is >0, wherein the process comprises: (A) providing an essentially aqueous mixture comprising at least one lithium-containing compound, at least one vanadium-containing compound in which vanadium has the oxidation state +5 and/or +4, and at least one M 1 -containing compound, if present, and/or at least one M 2 -containing compound, if present, and at least one reducing agent which is oxidized to at least one compound comprising at least one phosphorous atom in oxidation state +5, (B) drying the mixture provided in (A), in order to obtain a solid compound and (C) calcining the solid compound obtained from (B) at a temperature of 300 to 950° C.; wherein the compound is in a form consisting essentially of spherical particles or agglomerates having a diameter of from 3 to 200 μm.