▎ 摘　　要

NOVELTY - Manufacturing a positive electrode (410), comprises: forming slurry by mixing graphene oxide, a binder and a positive electrode active material (411) in a solvent containing water; applying the slurry on a positive electrode current collector (413); and reducing the graphene oxide, where the step of reducing the graphene oxide comprises at least one of chemical reduction and thermal reduction, the binder comprises polysaccharide, the chemical reduction is a step of immersion in a reducing agent solution, and the thermal reduction is a step of heating at 125-200degrees Celsius for 1-20 hours. The polysaccharide is starch. The reducing agent solution is an ascorbic acid solution. USE - The method is useful for manufacturing a positive electrode for a secondary battery (claimed). ADVANTAGE - The method: utilizes graphite that has relatively high capacity per unit volume, relatively small volume expansion, low cost, and higher level of safety than that of a lithium metal; provides secondary battery with high capacity, hence the secondary battery itself can be made more compact and lightweight as a result of improved characteristics of the secondary battery; and utilizes the sulfide-based solid electrolyte that has high conductivity of some materials, low-temperature synthesis, and ease of maintaining a path for electrical conduction after charging and discharging because of its relative softness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a secondary battery (400). DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a secondary battery. Secondary battery (400) Positive electrode (410) Positive electrode active material (411) Positive electrode current collector (413) Solid electrolyte layer (420)