Chapter 6 - Supercapacitors based on two-dimensional transition metal dichalcogenides and their hybrids

Abstract

The development of renewable energy conversion and storage devices with high efficiency, stability operation, environmental friendliness, and low-cost goals, provides a promising approach to resolve the global energy crisis. The two-dimensional (2D) layered materials have drawn enormous attention due to their unique layered structure and intriguing electrical characteristics. Transition metal chalcogenides have attracted a great deal of interest in the chemical and physical research fields. These materials have a common crystal structure: as they usually consist of 2D layers stacked along the direction perpendicular to the layers. The combination of layers is generally attributed to van der Waals interaction forces, hence making the layered chalcogenides potential hosts for intercalation. Intercalation of alkali metals or alkali earth metals in-between layers of layered metal chalcogenide materials result in interesting physical and chemical properties and hence make these materials useful for various applications including the application of energy storage.