Chalcogenides-based Functional 2D Nanostructure for Energy Storage Application

Two-dimensional (2D) chalcogenide materials have gained tremendous interest for energy storage applications because of their unique characteristics, such as high surface area, high conductivity, and many other chemical compositions. The focus of this chapter is the recent development of chalcogenide-based 2D nanostructures designed for a supercapacitor electrode. The chapter attempts to synthesize 2D chalcogenide materials with a desired architecture, composition, and defects through different synthesis methods, which include Chemical Vapor Deposition (CVD), hydrothermal/solvothermal methods, and exfoliation of layers. The assessment of those electroactive materials as the active components of supercapacitor devices is performed on the performance metrics of specific capacitance, energy density, power density, and cycling stability for different chemistries. Also, in this chapter, the improved performance of chalcogenide supercapacitors is discussed, such as the incorporation of dopants, composites with different materials, and the engineering of the structure of chalcogenides. The challenges and future directions of devices are also discussed. To summarize, this chapter highlights recent advances made in chalcogenide-based 2D nanostructures for supercapacitors in research and commercial applications.