▎ 摘　　要

NOVELTY - Graphene layer(s) (14) is formed onto the surface of a conductive substrate (12) by using chemical vapor deposition at temperature (I) using mixture (I) comprising methane and hydrogen, catalyst particles are deposited onto a surface (24) of the graphene layer(s), and nanotubes (16) are grown onto the surface of graphene layer(s) by using chemical vapor deposition at temperature (II) using mixture (II) of ethylene and hydrogen to form a binder-free hybrid carbon nanotube and graphene nanostructure (10). USE - Formation of binder-free hybrid carbon nanotube and graphene nanostructure used in energy devices, such as batteries e.g. lithium ion batteries (all claimed). Can also be used for electrical double layer capacitors and redox capacitors. ADVANTAGE - The method provides binder-free hybrid carbon nanotube and graphene nanostructure having increased surface area and unique electrical properties which make it applicable in energy storage, biochemical sensing and three-dimensional interconnected network applications. The graphene layer acts as a barrier layer and prevents or minimizes alloying of the conductive substrate, and as a passivation layer and prevents oxidation and corrosion of conductive substrate, thus enhancing the electrochemical stability of the electrode. The nanostructure provides a seamless connection between graphene and pillar carbon nanotubes, and provides an active material-current collector with increased integrity, thus facilitating charge transfer. The nanostructure provides battery having excellent cycle performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) battery; and (2) energy device. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the hybrid nanostructure. Hybrid carbon nanotube and graphene nanostructure (10) Conductive substrate (12) Graphene layer (14) Carbon nanotubes (16) Surface of graphene layer (24)