▎ 摘　　要

NOVELTY - Manufacture of electrode material involves electrostatically adsorbing a cationization agent to an electrode active substance, and then electrostatically adsorbing a graphene material to the electrode active substance to which the cationization agent is electrostatically adsorbed, or electrostatically adsorbing cationization agent to graphene material, and then electrostatically adsorbing resultant graphene material to the electrode active substance. The electrode material contains electrode active substance coated with graphene material. USE - Manufacture of material used for electrode (all claimed) for lithium-ion secondary battery. ADVANTAGE - The method enables manufacture of thin electrode material having excellent electroconductivity and uniformity. The electrode material can suppress battery deterioration on severe use conditions, such as repeated use and use in high temperature, without impairing output characteristics by using for secondary battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for electrode material. The cationization agent includes cationic low-molecular weight compound containing quaternary ammonium cation and pyridinium salts, and/or cationic high-molecular compound.