Electrode material and method for producing electrode material

A method for producing an electrode material comprising:

• a mixing step 1 of dispersing and mixing a base material of an electrode active material in a fine powder form, a Li ion source material, and an ion source material of at least any one containing one or both of Fe ion and Mn ion, said electrode active material being represented by a general formula LiMPO4(wherein, M=[FetMN1-t], and t is a number between 0 inclusive and 1 inclusive);
• a mixing step 2 of dispersing and mixing the mixture obtained from the mixing step 1 and a phosphate ion source material or multivalent phosphate ion source material;
• a mixing and granulating step 3 of dispersing and mixing the mixture obtained from the mixing step 2 and conductive carbon C source material and minutely granulating the mixture until the aggregate particle diameter becomes 1 μm inclusive to 50 μm inclusive;
• and
• a calcinating step 4 of calcinating the mixture obtained from the mixing and granulating step 3 to form a layer having a Li ion conductive substance including Li, one or both of Fe and Mn, P and O, and conductive carbon C on the surface of primary particles of the base material of electrode active material in fine powder form represented by the general formula LiMPO4.