Hydrothermal-Assisted In Situ Growth of Vertically Aligned MoS₂ Nanosheets on Reduced Graphene Oxide Fiber Fabrics toward High-Performance Flexible Supercapacitors

Abstract

The intensive growth of smart portable devices has triggered a boom in the research of all-solid-state flexible supercapacitors. However, the unsatisfactory mechanical flexibility and limited energy density still hinder their practical application. Herein, a combination hydrothermal-assisted assemble strategy is proposed to design reduced graphene oxide fiber/MoS 2 nanosheet-assembled composite fabrics (rGOFF−MoS 2 ), where the MoS 2 nanosheets vertically grow on the surface of rGO fibers through C−O−Mo covalent bonds. The synthesized rGOFF−MoS 2 fabrics present an inter-linkage isotropy skeleton, a robust fusing node, an in situ vertical covalent bridge, an adequate pseudocapacitive reactivity, and a large electrochemical active surface (80.1 m 2 /g), resulting in fast interlaminar conductivity, great ionic migration and adsorption, and outstanding mechanical stability. The as-prepared flexible electrode displays a large capacitance of 330 F/g at 0.1 A/g (1330 mF/cm 2 at 1 mA/cm 2 ) and a high stability (95% capacitance retention after 10,000 cycles) in the H 2 SO 4 electrolyte. Additionally, the assembled solid-state flexible supercapacitor presents an energy density of 69.44 μW h/cm 2 (0.5 mW/cm 2 ) and an excellent mechanical flexibility, making the rGOFF−MoS 2 fabric a highly competitive candidate for practical applications in next-generation wearable/smart electronics.

Interfacial engineering of transition metal dichalcogenide/carbon heterostructures for electrochemical energy applications

“…The authors ascribed the excellent capacitance to the in situ vertical covalent bridge at the V-MoS 2 /G interface, which provided a large electrochemical active surface (80.1 m 2 g À1 ), high interlaminar conductivity, and efficient ionic migration and adsorption. 174 As for ZIB applications, the advantages of the vertical orientation interface in V-TMDC/C heterostructure were also investigated. As shown in Fig.…”

“…The authors ascribed the excellent capacitance to the in situ vertical covalent bridge at the V-MoS 2 /G interface, which provided a large electrochemical active surface (80.1 m 2 g −1 ), high interlaminar conductivity, and efficient ionic migration and adsorption. 174…”

Cobalt‐Nickel Ultrathin Hexagonal Nanosheets for High‐performance Asymmetric Supercapacitors

“…[7][8] To improve this issue, many researchers have devoted considerable efforts to design innovative electrode materials with good electrochemical performance. [9][10] Transition metal oxides, nitrides, hydroxides, and sulfides are considered as promising SCs electrode materials. [11][12][13][14][15][16] They store electrical energy by fast and continuous redox reactions and hence exhibit much higher capacitance than traditional carbon materials.…”

“…However, the energy density of SCs is relatively low, which limits their development and wide‐scale practical applications [7–8] . To improve this issue, many researchers have devoted considerable efforts to design innovative electrode materials with good electrochemical performance [9–10] …”

Advances in the Robustness of Wearable Electronic Textiles: Strategies, Stability, Washability and Perspective

“…), printing (screen printing [75,76], inkjet printing [77,78], extrusion printing [79,80], gravure printing [81,82], laser printing [83,84], stencil printing [85,86], 3D printing [87,88], etc. ), electrospinning (melt spinning [89,90], dry spinning [91,92], wet spinning [93,94], etc. ), electrodeposition [95,96], polymerization [97], thin-film deposition [98,99], nanopattern [100], etc.…”