Iron (III) orthophosphate-carbon composite

A method for the production of an iron(III) orthophosphate-carbon composite that contains iron(III) orthophosphate-carbon composite that contains iron(III) orthophosphate of the general formula FePO4×nH2O (n<2.5) comprising:

• dispersing a carbon source in a phosphoric acid aqueous Fe2+ ion-containing aqueous solution to obtain a dispersion, wherein the aqueous Fe2+ ion-containing solution is prepared by adding iron(II), iron(III) or mixed iron(II,III) compounds, selected from the group consisting of hydroxides, oxides, oxide-hydroxides, hydrated oxides, carbonates, hydroxide carbonates and mixtures thereof, together with elementary iron, to a phosphoric acid-containing aqueous medium to bring Fe2+ ions into solution and to convert Fe3+ with the elementary Fe, by a comproportionation reaction, to Fe2+ and then separating solids from the phosphoric acid aqueous Fe2+solution, adding an oxidizing agent to the dispersion to precipitate the iron(III) orthophosphate-carbon composite from the aqueous solution, and separating the iron(III) orthophosphate-carbon composite precipitate from the aqueous solution, wherein the iron(III) orthophosphate-carbon composite contains iron(III) orthophosphate of the general formula FePO4×nH2O (n<2.5).