Method of preparing lithium iron phosphate having high conductivity and superior low temperature discharge property

The invention relates to a preparation method of lithium iron phosphate, in particular to a preparation method of the lithium iron phosphate having high conductivity and good low-temperature discharge performance. The method mainly aims at solving the defects of low conductivity, poor low-temperature discharge performance and the like of the lithium iron phosphate prepared by the existing method and provides the preparation method of the lithium iron phosphate having high conductivity and good low-temperature discharge performance. The main technical proposal of the preparation method is as follows: a soluble ferrous iron salt solution is adopted for mixing with a phosphoric acid solution or a soluble phosphate solution, then alkali is used for neutralization to obtain a superfine Fe3(PO4)2.xH2O precipitate with particle D50 being 1-5[mu]m, and then the precipitate is mixed with lithium phosphate and a conductive agent for sintering at high temperature.