Electrode material, electrode, and lithium ion battery

An electrode material comprising carbonaceous electrode active material complex particles including a carbonaceous material film on surfaces of electrode active material particles, wherein

• the water content of the carbonaceous electrode active material complex particles is 5% by mass or less,
• the oxygen content of the carbonaceous material film is 4.2% by mass or less,
• a coating ratio of the carbonaceous material film on the surfaces of the carbonaceous electrode active material complex particles is 60% or more,
• the content of carbon in the carbonaceous electrode active material complex particles is in a range of 0.3% by mass to 8.0% by mass,
• the electrode active material particles include one or more selected from the group consisting of lithium cobaltate, lithium nickelate, lithium manganate, lithium titanate, and LixAyDzPO4 as a main component, wherein A represents one or more selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr;
• D represents one or more selected from the group consisting of Mg, Ca, S, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y, and rare earth elements;
• 0<x<2;
• 0<y<1.5;
• and 0≦z<1.5, and
• the amount of oxygen in the carbonaceous material film is determined such that the electrode active material in the carbonaceous electrode active material complex particles is dissolved using a hydrochloric solution to obtain a carbonaceous substance, and the carbonaceous substance is washed using pure water and is vacuum-dried, and the amount of oxygen of the obtained dried substance is measured using an oxygen and nitrogen analyzer.