METHOD FOR PRODUCING LITHIUM IRON PHOSPHATE

To provide a method for producing lithium iron phosphate possessing a high discharge capacity as an inexpensive positive active material by using inexpensive iron particles as an iron source. The lithium iron phosphate is manufactured by a synthesizing step of adding iron particles containing oxygen to an aqueous solution containing a phosphoric acid, a carboxylic acid and a lithium source, and making the components contained in the aqueous solution and the iron particles react with each other under an oxygen atmosphere; a lithium iron phosphate precursor forming step of drying the reaction liquid obtained in the synthesizing step; and a primary baking step of baking the lithium iron phosphate precursor obtained in the lithium iron phosphate precursor forming step under a non-oxidizing atmosphere, to obtain the lithium iron phosphate.