▎ 摘　　要

NOVELTY - An electrode active material composite comprises transition metal oxide complexed by electrostatic attraction, a branched water-soluble polymer having primary and secondary amino groups and reduced graphene oxide. USE - Composite for manufacturing active material for negative electrode of secondary battery (all claimed) e.g. lithium secondary battery used as power supply for hybrid electric vehicles. ADVANTAGE - The composite has excellent electrochemical characteristics and low impedance, and provides battery having high capacity and excellent rate characteristics and stability. The composite having high quality is produced quickly by simple method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of electrode active material.