▎ 摘　　要

NOVELTY - The carbon nanostructure has carbon containing rod-shaped materials or carbon containing sheet-shaped materials which are bound three-dimensionally. The graphene multilayer membrane walls are formed in the rod-shaped materials or the sheet-shaped materials. The air-sac-like pores are defined by graphene multilayer membrane walls and are formed in the rod-shaped materials or the sheet-shaped materials. The rod-shaped materials or the sheet-shaped materials are configured as an integrated monolith of three-dimensional network structure. USE - Carbon nanostructure used as e.g. negative electrode of lithium secondary battery and catalyst carrier. Can also be used in fuel cell and supercapacitor. ADVANTAGE - The electric conductivity and current density of the carbon material in carbon nanostructure are increased. The residue of metallic materials remaining in the metal encapsulated carbon nanostructure can be removed easily by performing washing treatment for 4 to 8 hours by immersing the metal encapsulated carbon nanostructure in nitric acid. DETAILED DESCRIPTION - The diameter of each of rod-shaped materials and a width of each of the sheet-shaped materials are within a range of 100 nm to 10 um respectively. The air-sac-like pores are classified into main pores having a void diameter of 1 nm to 20 nm and sub pores having a void diameter of 10 nm to 80 nm. The BET specific surface area is 80 m2/g or 300 m2/g. DESCRIPTION OF DRAWING(S) - The drawing shows a graph showing thermogravimetric analysis of carbon nanostructure.