Development of binder-free MoTe2/rGO electrode via hydrothermal route for supercapacitor application.

• A bind-free MoTe 2 /rGO nanohybrid electrode was developed via a hydrothermal route. • A MoTe 2 nanoparticles are anchored on the rGO nanosheet investigated by scanning electron microscopy (SEM). • MoTe 2 /rGO nanohybrid display a remarkable specific capacitance of 1196.4 F g−1 as compared to pristine material. The rising prevalence of electronic devices necessitates the application of supercapacitors, which rely on electrochemically active materials with high capacitive performance. Two-dimensional (2D) molybdenum ditelluride (MoTe 2) nanoarrays have piqued great interest due to their wide-range applications including supercapacitor material, because of the inherent layered structure, low band gap and comparable conductivity. On the other hand, its self-aggregations decrease its chemical stability and activity, which remains a major barrier to its actual application. By combining with carbon-based reduced graphene oxide (rGO), self-aggregation and electrochemical activity can be improved significantly. In this research, MoTe 2 -supported rGO (MoTe 2 /rGO) was fabricated via a low-cost facile hydrothermal approach and characterised by fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), and energy dispersive X-ray spectroscopy (EDX) that is inclined with scanning electron microscope (SEM). Electrochemical assessments were also accomplished in an aqueous electrolytic solution of 2.0 M potassium hydroxide (KOH) for supercapacitor performance. The MoTe2/rGO shows exceptional specific capacitance (Cs) of 1196 F g−1, specific energy of 83.06 Wh kg−1- as well as 353.5 W kg−1 specific power at a current density of 1 A g−1 measured from galvanostatic charge/discharge (GCD) profile. On the other hand, the composite shows specific capacitance of 757.40 F g−1 measure via cyclic voltammetry (CV) at a scan rate of 5 mV s−1. Additionally, the nanohybrid shows a robust retention capacitance of 94.23% after 5000th successive cycles at 1 A g−1. The mechanical flexibility, intense cooperation and combined effects of MoTe 2 and rGO nanosheets are responsible for the exceptional performance of supercapacitor applications. Because of its enormous potential for green energy generation and its simplicity of manufacture in a single step, MoTe 2 /rGO nanocomposite can serve as an electrode for extraordinary supercapacitors. [Display omitted] [ABSTRACT FROM AUTHOR]