Rationally designed graphene-nanotube 3D architectures with a seamless nodal junction for efficient energy conversion and storage

Abstract

Seamlessly joint graphene-nanotube 3D architectures were created by one-step CVD for efficient energy conversion and storage.

Carbon-Based Metal-Free Electrocatalysis for Energy Conversion, Energy Storage, and Environmental Protection

“…Because of high abundance, high electrical conductivity, structure tunability at the atomic level, high selectivity, strong tolerance to acidic/alkaline conditions, and eco-friendliness [4,5], many nanostructured carbon materials have been developed as metal-free catalysts with impressive electrocatalytic performances for ORR, HER, OER, and/or CO 2 RR, key reactions involved in energy conversion/storage and environmental protection processes [3,[6][7][8][9]. The electrocatalytic performances of metal-free carbon-based catalysts were further found to be tuneable through the regulation of the nanoparticles size, macrostructures, and electrode architectures, along with the introduction of heteroatoms (doping) and defects [8,9].…”

Template-directed growth and mechanical properties of carbon nanotube–graphene junctions with nano-fillets: molecular dynamic simulation

“…Gradually, these defects and nanopores are sealed during annealing, resulting in relatively high-quality graphene, CNT and their junctions. 10 Aer long heat treatment at high temperature, the disordered graphene layers can become more ordered structures. The number of layers of the junctions depends on the amount of carbon provided in the growth process, while llets with different angles can be formed by changing the template conguration.…”

“…10 To explain the experimental results, we calculated the potentials of the as-growth junctions with different llet angles at near zero temperature (T ¼ 0.05 K). However, only one structure (135 llet) was observed in the experiment.…”

“…Theoretical studies on 3D CNT pillar-G plane nanoarchitectures have revealed outstanding mechanical, thermal and electrical properties of these 3D materials, which are potential in various applications such as aerospace, integrated circuit, energy generation and storage. 10 Specically, 3D graphene-CNT hollow bers with aligned CNTs seamlessly sheathed by a graphene layer were synthesized through a one-step chemical vapor deposition using an anodized aluminum wire template. Zhao et al 6 produced covalently C-C bonded junction through one-step catalytic growth.…”

“…10 To generate the amorphous alumina templates, an alumina crystal structures was heated at a temperature of 5000 K for 350 ps and then quenched to room temperature. To understand the CNT-G junction growth mechanism and molecular structures, a MD method was employed to simulate the growing process of the 3D nanostructures.…”