| abstract |
The present invention relates to a method for preparing a carbon-coated lithium iron phosphate nano powder, which method comprises the following steps: (a) preparing by adding a lithium precursor, an iron precursor, and a phosphorus precursor to a glycerol solvent; A mixture solution, (b) placing the mixture solution into a reactor and heating to prepare amorphous lithium iron phosphate nanoparticle, and (c) heat-treating the lithium iron phosphate nanoparticle to prepare a portion of the particle Carbon coated lithium iron phosphate nano powders on the surface or all surfaces, and the present invention relates to carbon coated lithium iron phosphate nano powders prepared by the above method. By implementing 2 simple steps, a carbon-coated lithium iron phosphate nano powder having a controlled particle size and particle size distribution can be prepared in a short time. The lithium secondary battery including the carbon-coated lithium iron phosphate nano powder prepared as a cathode active material has good capacitance and stability. |