Chapter 17: Sustainability of Green Nanocomposite-based Supercapacitors: Advances and Limitations

The growing environmental and sustainability awareness has encouraged efforts to design nanobased composite materials for various end-use applications and as a unique alternative to nonrenewable synthetic fibers, such as glass and carbon-reinforced nanocomposites. Supercapacitors, on the other hand, play a key role in energy storage and conversion systems. With increased scientific activity and publications on this subject over the previous decade, researchers have created improved techniques to enhance electrode materials. Many other materials have been proposed and researched, but carbonaceous materials remain the most promising for use in supercapacitors. To overcome the limitations of individual materials, particularly while considering the density and longevity of energy, nanocomposite materials have been widely employed. The majority of them are composites of carbon-based nanoparticles and other components. We describe current achievements in the area of nanocomposite materials, including green nanocomposite-based supercapacitors, in this chapter. We concentrate on scenarios in which a single material has a disadvantage that may be solved by the process of mixing it with other green nanocomponents, allowing the construction of a composite material with improved performance. In this chapter, we discuss the fundamentals of nanocomposite green materials, including their production, characterization, and performance.