Enhancement of transition metal-based supercapacitor materials for improved performance

Abstract

In this research work, metal-doped MoS2 of Cobalt and Manganese (Co-MoS2 and Mn-MoS2) nanocomposites of different ratios of dopant concentrations were synthesized with a facile hydrothermal technique. The samples were characterized using various instruments to elucidate the properties and novelties of the prepared nanomaterials and likewise to establish their supercapacitive suitability for energy storage devices. The bibliometric evaluation of the development of literary works involving supercapacitor devices since the use of MoS2 as the active materials in energy storage (Supercapacitor) was performed. The bibliometric analysis of the studied materials gives us perspectives on the strengths and weaknesses of the materials, which enable us to identify the area of focus and the targeted publication outlets. The Co-MoS2 electrode materials (CMS1 and CMS3) were electrochemically evaluated for their energy storage performance, the materials exhibit specific capacitances of 164 and 146 Fg-1 at 1 Ag-1 for the working electrodes, respectively. Also, the energy densities of 3.67 and 2.05 Wh/kg with power densities of 3279.97 and 2960.26 W/kg were calculated for both electrode materials, respectively. While the electrochemical performance of the Mn-doped MoS2 electrode material showed a pseudo-capacitive behavior, with a specific capacitance of 70.37 Fg−1, and with a corresponding energy density of 3.14 Whkg−1 and a power density of 4346.35 Wkg−1. The general obtained results show that the electrode materials were well prepared and the enhancement of MoS2 properties is achievable with the transition metal composites. These improved properties of MoS2 composites showing the suitability of the nanomaterials for the energy storage applications have been explained in this work with possible future works recommended in the report.