- 3 - Li-air battery using current collector-catalysts monolithic 3 dimensional nanofiber network for Li-air battery and manufacturing method thereof

摘要

The present invention relates to an electrode for a lithium-air battery and a method of manufacturing the same. More specifically, the present invention relates to a nanofiber network, And a nanofiber network-based current collector with improved thickness and specific surface area and improved breathability-catalyst integrated porous cathode. When the individual nanofibers constituting the nanofiber network having a woven structure are nonconductive materials, a porous cathode including a conductive catalyst layer uniformly coated on the surface, that is, a single-layered core (nonconductive nanofiber) / shell (Non-conductive nanofibers) that simultaneously provide a first coating layer (conductive layer) and a second coating layer (catalyst layer) simultaneously or uniformly and continuously coated on the surfaces of individual nanofibers, / Shell (first conductive layer / second catalyst layer) structure. When the individual nanofibers constituting the nanofiber network having a woven structure are conductive carbon nanofibers, a porous cathode including a conductive catalyst layer or a catalyst layer uniformly coated on the surface, that is, a single-layer type core (conductive carbon nanofibers) / Shell (first conductive catalyst layer) or a single-layered core (conductive carbon nanofiber) / shell (first catalyst layer) structure. These nanofiber network electrodes can have as many reaction sites as possible in a single size through a laminate structure in which the layers are stacked, superimposed, or rolled, and excellent electric conductivity, smooth air and lithium ion movement, There is provided an effect of providing a nanofiber network electrode for an air electrode of a lithium-air battery having a laminate structure capable of improving the current density and stability at a reasonable cost and being capable of large-area and mass-production at low cost, and a method for producing the same.