Patent ID: 11189826

Abstract:
An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material represented by LiFexMn1-w-x-yMgyAwPO4 and a carbonaceous film coating a surface of the electrode active material, a particle diameter D10 of secondary particles is 0.5 μm or more, a particle diameter D90 of the secondary particles is 25 μm or less, and a ratio (O/I) of an average value of thicknesses I of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 μm or less from a center of the secondary particle at 300 measurement points to an average value of thicknesses O of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 μm or less from an outermost surface of the secondary particle at 300 measurement points is 0.85 or more and less than 1.00.