A seamless three-dimensional carbon nanotube graphene hybrid material

Abstract

Graphene and single-walled carbon nanotubes are carbon materials that exhibit excellent electrical conductivities and large specific surface areas. Theoretical work suggested that a covalently bonded graphene/single-walled carbon nanotube hybrid material would extend those properties to three dimensions, and be useful in energy storage and nanoelectronic technologies. Here we disclose a method to bond graphene and single-walled carbon nanotubes seamlessly during the growth stage. The hybrid material exhibits a surface area 42,000 m 2 g À 1 with ohmic contact from the vertically aligned single-walled carbon nanotubes to the graphene. Using aberration-corrected scanning transmission electron microscopy, we observed the covalent transformation of sp 2 carbon between the planar graphene and the single-walled carbon nanotubes at the atomic resolution level. These findings provide a new benchmark for understanding the three-dimensional graphene/ single-walled carbon nanotube-conjoined materials.

Scalable self-growth of Ni@NiO core-shell electrode with ultrahigh capacitance and super-long cyclic stability for supercapacitors

“…Among these nanostructures, three-dimensional (3D) porous nanoarchitectures have been demonstrated to be a promising candidate for SCs as these nanoarchitectures can offer large interfacial areas, reduced ionic diffusion distances and facilitate charge separation and transport. For instance, 3D graphene-based electrodes, such as graphene/carbon nanotubes, 14 graphene/Co 3 O 4 15 and graphene/MnO 2 , 16,17 have been developed. Despite these achievements, it is highly desirable to develop a simple and scalable method for the construction of high-performance 3D electrodes.…”

Molecular dynamics simulation study of a carbon-nanotube oscillator in a graphene-nanoribbon trench

“…Quite recently, fullerene-graphene hybrids have been experimentally produced and theoretically investigated [34][35][36][37][38][39]. In particular, nanotube-graphene hybrid also has great potential application [40][41][42][43][44][45][46][47][48]. Theoretical work suggested that a covalently bonded graphene-nanotube hybrid material would extend those properties to three dimensions, and be useful in energy storage and nanoelectronic technologies [40].…”

“…In particular, nanotube-graphene hybrid also has great potential application [40][41][42][43][44][45][46][47][48]. Theoretical work suggested that a covalently bonded graphene-nanotube hybrid material would extend those properties to three dimensions, and be useful in energy storage and nanoelectronic technologies [40]. Zhu et al [40] disclosed a method of seamlessly bonding graphene and single-walled CNTs, during the growth stage.…”

Mechanical behavior of carbon nanotube and graphene junction as a building block for 3D carbon nanostructures

“…The CNT-GS composites significantly outperformed many electrode materials currently used in the state-of-the-art hydrogen storage 36 and supercapacitors. [37][38][39] For the first time, Kondo et al 40 outlined a synthesizing method for CNT-GS interconnect by using CVD. Thereafter, several experimental works have been pursued to fabricate and characterize the pillared GS.…”

“…Thereafter, several experimental works have been pursued to fabricate and characterize the pillared GS. [37][38][39][41][42][43] Regardless of the great theoretical and experimental interests together with important technological potential, there is a notable lack of knowledge on mechanical behavior of carbon composite nanostructures as a result of technical difficulties. 57 The objective of this study is mechanical investigation of GS in CNT-GS junction during in-plane loading while it possesses desirable out-of-plane mechanical properties and examination of the CNT role in improvement of defected GS's mechanical properties.…”