PREPARATION METHOD FOR LITHIUM IRON PHOSPHATE CATHODE MATERIAL AND LITHIUM BATTERY

The present application belongs to the field of lithium battery technology, particularly relating to a preparation method for lithium iron phosphate cathode material and lithium battery. The method comprises: adding lithium source, iron source, phosphorus source, first carbon source, dopant, and dispersant into a solvent according to a preset ratio for mixing and grinding treatment to obtain the first mixture; Drying the first mixture and performing the first sintering in an inert gas atmosphere to obtain the lithium iron phosphate precursor; Adding borohydride, deionized water, second carbon source, and dispersant to the lithium iron phosphate precursor for pretreatment to obtain the lithium iron phosphate precursor mixture; After mixing, grinding, and drying the lithium iron phosphate precursor mixture, performing a second sintering in an inert gas atmosphere to obtain a coated doped type lithium iron phosphate cathode material.