2D‐TMDs based electrode material for supercapacitor applications

Abstract

Transition metal dichalcogenides (TMDs) have been attracted the researchers to design high-performance electrodes to elevate power and energy density for better performance of energy storage devices. The attraction is due to the better surface area, high conductivity with distinct oxidation states, and the layered structure of TMDs. These characteristics persuade the TMDs to be the most favorable contenders to store energy via a cross-charge storage structure.TMDs belong to the family of two dimensions (2D) materials. This review article focused on graphene, molybdenum disulfide (MoS 2 ), and tungsten disulfide (WS 2 ) based electrode materials for supercapacitor applications. MoS 2 showed remarkable chemical/physical characteristics like tunable bandgap, specific surface area, mechanical friction, and high wear resistance. The researchers showed that the nanostructured materials of MoS 2 have exceptional characteristics and tremendous potential as supercapacitor electrodes. The MoS 2 composites have porous and hollow structures that display better energy storage characteristics. MoS 2 has excellent potential to fill the gap as an electrode material for energy storage devices and eco-friendly applications. There is much opportunity for scientific progress in the interdisciplinary sector. The nanostructures of WS 2 have auspicious qualities like good surface area, and excellent electrochemical characteristics, which make the WS 2 a super candidate for supercapacitor application. The WS 2 -based composites also showed excellent results for supercapacitors and other energy storage devices. Herein we study comparatively the properties of these materials discus as capacitance, energy density, power density, rate of retention, cyclic stability, and electrochemical properties.

Improved Charge Storage Capacity of Supercapacitor Electrodes by Engineering Surfaces: The Case of Janus MXenes

“…MXenes, the class of two-dimensional (2D) materials with chemical formula M n +1 X n T 2 (M is a transition metal, X is either carbon or nitrogen, T is a functional group like –O, –F, or −OH passivating the surface) discovered only about a decade ago, have grabbed the attention of the materials research community. This is due to the superior electrochemical performance of the first discovered MXene Ti 3 C 2 T x , over other established 2D materials like graphene, − transition metal dichalcogenides (VSe 2 , WS 2 ), and transition metal oxides (RuO 2 , , MnO 2 , − NiO). Flexibility in the composition makes MXenes suitable for the further exploration of enhanced functionalities by tweaking their compositions and structures.…”

Designed fabrication of MoS2 hollow structures with different geometries and the comparative investigation toward capacitive properties

“…Generally speaking, the synthesis method of layered MoS 2 can be divided into top-down methods and bottom-up methods, and can be further subdivided into four categories: mechanical/ chemical stripping, liquid phase stripping, hydrothermal/ hydrothermal and chemical vapor deposition. 16,17 Taking into account the conditions in the actual synthesis process, the hydrothermal method has been widely adopted because of its simplicity, speed and low cost. However, the structure of molybdenum disulfide is difficult to control during the simple hydrothermal process.…”

Designing high-performance polyaniline @MoS2@AC hybrid electrode for electrochemical–based Next-generation battery-supercapacitor hybrid energy storage device and hydrogen evolution reaction

“…TMDs semiconductor-based electrode materials have been studied extensively and exhibited a high value of theoretical capacitance owing to advanced stability, conductive nature, and surface area [18][19][20][21][22][23]. Molybdenum disulfide (MoS 2 ) has a narrow band gap of 1.8 eV.…”