One-Pot Synthesis of Three-Dimensional Graphene/Carbon Nanotube/SnO₂ Hybrid Architectures with Enhanced Lithium Storage Properties

Abstract

Three-dimensional (3D) graphene/carbon nanotube (CNT)/SnO2 (GCS) hybrid architectures were constructed by a facile and cost-effective self-assembly method through hydrothermal treatment of a mixture of Sn(2+), CNTs, and graphene oxide (GO). The resultant GCS displayed a 3D hierarchically porous structure with large surface area and excellent electrical conductivity, which could effectively prevent the aggregation and volume variation of SnO2 and accelerate the transport of ions and electrons through 3D pathways. Benefiting from the unique structure and the synergistic effect of different components in the hybrid architectures, the GCS exhibited a remarkably improved reversible capacity of 842 mAh g(-1) after 100 cycles at 0.2 A g(-1) and excellent rate performance for lithium storage compared with that of graphene/SnO2 (GS) hybrid architectures. Hence, the impressive results presented here could provide a universal platform for fabricating graphene/CNT-based hybrid architectures with promising applications in various fields.

Self‐Assembled Three‐Dimensional Graphene Aerogel with an Interconnected Porous Structure for Lithium‐Ion Batteries

“…GH contains a lower proportion of oxygen and a higher proportion of carbon than GO, which is mainly because the hydrophilic GO sheets are reduced to hydrophobic GH in the hydrothermal process. [43,44] The further heat treatment of GH may lead to the decomposition of the oxygen-containing functional groups, which is responsible for the much lower oxygen content of 3DGA. The high-resolution C 1s XPS spectra of GO, GH and 3DGA are shown in Figures 5b, 5c and 5d, respectively.…”

Porous V2O5/RGO/CNT hierarchical architecture as a cathode material: Emphasis on the contribution of surface lithium storage

“…Furthermore, when a hierarchical assembly structure is designed to solve the above problems, a strategy for increasing the surface area can be possible by the introduction of materials with another dimensionality. By employing the 1D CNT, metal oxide/graphene/CNT ternary composites have been reported2223, and the role of CNT in the composites is generally expected to avoid the restacking of graphene sheets as a pillar and to enhance the electron transport by constructing 3D electrical conductive networks24. However, the increase in surface area of the ternary composite by the introduction of CNT is yet insignificant2526 compared to metal oxide/graphene binary composite, or otherwise the surface area rather decreases with the addition of CNT27.…”

An effective solid contact for an all-solid-state polymeric membrane Cd 2+ -selective electrode: Three-dimensional porous graphene-mesoporous platinum nanoparticle composite

“…3b). The intensities of C O, C O and O C O are largely decreased as compared to those of GO [31], which indicates an efficient deoxygenation of GO through the hydrothermal reaction. Furthermore, the XPS spectrum of the Pt 4f consists of two peaks assigned at 74.6 and 71.3 eV, which can be attributed to Pt 4f 5/2 and 4f 7/2, respectively (Fig.…”

“…In order to regulate the pore sizes, some nanomaterials have been introduced as cross-linking sites to 3D PGR [29,30]. Moreover, based on the synergistic effects between 3D PGR and the attached nanomaterials, the obtained 3D PGR composites would improve their performances in energy storage and conversion [31,32], environmental remediation [33,34], and photocatalysis [35]. Recently, mesoporous platinum nanoparticles (MPNs) with highly branched dendritic nanostructures have been used for catalysis and chemical sensors [36,37] because of their unique structural properties such as interconnected porosity, large interfacial area, and unique exposed atomic structures [38,39].…”