Lithium-ion secondary battery electrode material and its manufacturing method

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An electrode material for a lithium-ion rechargeable battery of the present invention is an electrode material for a lithium-ion rechargeable battery formed by coating a surface of an electrode active material represented by General Formula LiFe x Mn 1-x-y M y PO 4 (here, M represents at least one element selected from Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements, 0.05‰¤x‰¤1.0, 0‰¤y‰¤0.14) with a carbonaceous film, in which an angle of repose is in a range of 35° or more and 50° or less.