Preparation method of lithium iron phosphate-carbon material composite

The invention belongs to the technical field of energy material preparation and relates to a preparation method of a lithium iron phosphate-carbon material composite. The preparation method provided by the invention comprises the step of adding a phosphate-source compound, an iron-source compound and a lithium-source compound into a dispersed liquid containing a carbon material. With the adoption of the preparation method provided by the invention, the lithium iron phosphate-carbon material composite with a mean particle size of 0.02-10mum, a tap density of 1.8-2.2g/cm and a discharge specific capacity of 140-164mAh/g under 0.2C (2.4A of current) at room temperature can be prepared. The composite can be used as a cathode material of a lithium battery, which requires a high specific capacity and high cycling stability.