Abstract: A method of producing a cathode active material for a secondary battery is provided. The method includes preparing a mixture comprising a lithium source, a phosphate source, an iron source, a carbon source, a boron source comprising an oxo acid of boron, and a liquid medium; granulating the mixture to obtain a precursor; and heat-treating the precursor to obtain a lithium transition metal compound having an olivine structure, wherein in the mixture, a total molar amount of boron atoms contained in the boron source is more than 0% and less than 3% with respect to a total molar amount of iron atoms contained in the iron source as 100%.

Abstract: Provided is a cathode material that can further improve the high-rate performance in a lithium ion secondary battery. The cathode material inculeds secondary particles comprising: primary particles containing a lithium transition metal compound having an olivine structure; and carbon adhering to the surfaces of the primary particles, a plurality of which primary particles are aggregated. The content of the carbon is more than 0.5% by mass and 1.8% by mass or less with respect to the cathode material. The lithium transition metal compound has a crystallite size that is 50 nm to 70 nm. The cathode material has a specific surface area that is 14 m2/g to 45 m2/g.