▎ 摘　　要

NOVELTY - Producing high density cathode material., comprises (a) producing graphene oxide reduction product through cation-pi interaction, (b) coating polymer on silicon metal particles, and preparing a complex dispersion solution by first complexing with the graphene oxide reducing material and second complexing with the silicon metal particles after coating the polymer on the graphene oxide reducing material, (c) spray-drying the composite dispersion solution to produce a core-shell composite powder, (d) preparing a cathode material slurry by mixing natural graphite and artificial graphite with the composite powder, and (e) applying the slurry to the current collector. USE - The high density cathode material is useful in cathode for secondary battery (claimed). ADVANTAGE - The method can induce application of more effective silicon metal particles, produces graphene oxide reducing material-silicon metal particle composite for maintaining high capacity and reversible properties, is suitable for mass production through the introduction of a powder manufacturing method through spray drying, maximizes filling density of the electrode, and improves the high capacity and stable cycle performance of the secondary battery electrode. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) electrode comprising high-density negative electrode material containing graphene oxide reduced material-silicon metal particle composite prepared by the above method; and (2) high-density negative electrode material containing graphene oxide reduced material-silicon metal particle composite, comprising natural graphite, artificial graphite formed in a relatively smaller size than the natural graphite, and a composite comprising a silicon metal particle present inside the core and a coral graphene reduction material formed in an outer shell structure in a form surrounding the surroundings of the silicon metal particle.