Nanostructured MoS2/BiVO4 Composites for Energy Storage Applications

Abstract

We report the optimized synthesis and electrochemical characterization of a composite of few-layered nanostructured MoS2 along with an electroactive metal oxide BiVO4. In comparison to pristine BiVO4, and a composite of graphene/BiVO4, the MoS2/BiVO4 nanocomposite provides impressive values of charge storage with longer discharge times and improved cycling stability. Specific capacitance values of 610 Fg−1 (170 mAhg−1) at 1 Ag−1 and 166 Fg−1 (46 mAhg−1) at 10 Ag−1 were obtained for just 2.5 wt% MoS2 loaded BiVO4. The results suggest that the explicitly synthesized small lateral-dimensioned MoS2 particles provide a notable capacitive component that helps augment the specific capacitance. We discuss the optimized synthesis of monoclinic BiVO4, and few-layered nanostructured MoS2. We report the discharge capacities and cycling performance of the MoS2/BiVO4 nanocomposite using an aqueous electrolyte. The data obtained shows the MoS2/BiVO4 nanocomposite to be a promising candidate for supercapacitor energy storage applications.

Biological interactions of biocompatible and water-dispersed MoS2 nanosheets with bacteria and human cells

“…The unprecedented properties of graphene sparked a search for additional 2D materials with their own unique characteristics 1 . In general, 2DMs possess large surface areas combined with outstanding electronic, optical, electrochemical, mechanical and thermal properties that are opening new channels for fundamental scientific research and advanced technological applications 2 , 3 , there including sensing, catalysis, energy storage and functional nano composites 4 , 5 . The feature of being some of the thinnest 2D structures among all known materials with very high specific surface area makes them indispensable for applications requiring high levels of surface interactions at the nanoscale i.e.…”

Coupling Energy Capture and Storage – Endeavoring to make a solar battery

“…It shows single cathodic peak at −0.75 V which can be ascribed to single step reduction of Bi 3+ to Bi° and the two anodic peaks at −0.50 V and −0.38 V correspond to the two step oxidation of Bi 0 to Bi + and Bi + to Bi 3+ , respectively. The redox peaks were reproducible at higher scan rates, however the oxidation peaks shift towards positive potentials and reduction peak shifts towards negative potential which is mainly ascribed to the internal resistance 18 , Supplementary Fig. 2 .…”

“… 17 and Arora et al . 18 BiVO 4 has shown decent cycling stability considering it bears a 3-D crystal structure unlike conventional layered battery materials. Supplementary Fig.…”

“…BiVO 4 and Co 3 O 4 have a 3-D crystal structure unlike most of the conventional layered materials employed for energy storage. In the last few years, BiVO 4 has shown to be a good electroactive material especially in conjunction with CNTs 17 and with nanostructured MoS 2 18 . BiVO 4 undergoes reversible faradaic change (Bi 3+ ↔ Bi 0 ) on ramping the voltage and stores energy electrochemically.…”

Facile synthesis of BiSI and Bi13S18I2 as stable electrode materials for supercapacitor applications

“…This phenomenon is very common for CV curves, mainly derived from their iR drops or ion diffusion. 38 Fig . 8B displays overall galvanostatic charge-discharge (GCD) profiles of the BiSI-b sample at various current densities, between 2 and B10 A g À1 , while designating a potential are also reported to exhibit approximate pseudo-capacitive GCD behaviour.…”