Fabrication of Ultralong Hybrid Microfibers from Nanosheets of Reduced Graphene Oxide and Transition‐Metal Dichalcogenides and their Application as Supercapacitors

Abstract

Two-dimensional materials have attracted increasing research interest owing to their unique electronic, physical, optical, and mechanical properties. We thus developed a general strategy for the fabrication of ultralong hybrid microfibers from a mixture of reduced graphene oxide and transition-metal dichalcogenides (TMDs), including MoS2 , TiS2 , TaS2 , and NbSe2 . Furthermore, we prepared fiber-based solid-state supercapacitors as a proof-of-concept application. The performance of thus-prepared supercapacitors was greatly improved by the introduction of the TMDs.

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

“…Currently, a variety of strategies have been developed to assemble graphene-based fi bers. [108][109][110][111][112][113][114][115][116] For instance, rGO fi bers that have a density of 0.23 g cm −3 can be obtained by a dimensionally confi ned hydrothermal strategy. [ 108 ] Such rGO fi bers were able to serve as a substrate to support a layer of porous graphene network, which can be used as the electrodes of fl exible all-solid-state fi ber SC.…”

Three-dimensional graphene layers prepared by a gas-foaming method for supercapacitor applications

“…Two-dimensional (2D) graphene exhibits excellent physical and chemical properties, making it a promising candidate as an electrode material for EDLCs [5][6][7]. Unfortunately, the poor inter-sheet connections between isolated graphene nanosheets as building blocks break the continuous pathway for electron transport and severely suppress the intrinsically high conductivity and mechanical strength of individual graphene nanosheets [8,9].…”

Layer-by-layer printing of laminated graphene-based interdigitated microelectrodes for flexible planar micro-supercapacitors

“…Viscous GO suspension (20 mg/mL) was filled in an injection syringe mounted on a programmable positioning motor. Extrusion of GO ink through the microneedle leads to assembly of GO sheets into a highly-laminated thin film on the substrate due to the liquid crystalline behavior of highly concentrated GO suspension and the shear stress between the viscous solution and the inner wall of the needle [16]. The width and thickness of the printed patterns can be readily tuned by the needle diameter, extrusion speed, and scan rate.…”