▎ 摘　　要

NOVELTY - The metal-air battery comprises an anode portion having metal, a cathode portion having porous layer which comprises reduced non-stacked graphene oxide, and an electrolyte disposed between the anode portion and the cathode portion. The porous layer has reduced non-stacked graphene oxide which comprises adjacent layers separated by gap of 1 nanometer to 0.15 micrometer, and porous layer has porosity of 70 to 99 volume percent. USE - Metal-air battery utilizing oxygen as active material. ADVANTAGE - Energy density of metal-air battery is improved since metal-air battery utilizes oxygen as active material, and the cathode active material is not depleted over the course of multiple charge cycles. Improves mechanical properties, attains weight reduction, lower cost and ease of production, and can be easily manufactured. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of manufacturing metal-air battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram illustrating a method of forming porous layer included in cathode portion of metal-air battery.