▎ 摘　　要

NOVELTY - A porous material (20) comprises pores (12) having an average size of 100 nm or less and a minimum size of less than 60 nm, and graphene layer (24), which covers the pores. USE - Porous material e.g. porous metal used as electrodes (claimed) in electrical storage apparatus. Can also be used for hydrogen and oxygen generation. ADVANTAGE - The porous metal provides electrodes with electric and catalytic properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of porous material, which involves forming a porous metal (10) having a ligament (14) with an average size of 100 nm or less by heat treating nanoparticles (16) made of metal oxide, and forming a graphene layer on the surface of the porous metal. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view explaining the process for manufacture of the porous material. Porous metal (10) Pores (12,22) Ligament (14) Nanoparticles (16) Porous material (20) Graphene layer (24)