Energy storage is one of the crucial requirements for today’s life to store
energy for later use. Energy storage critically reduces the dependence on backup power
supplies. In recent times, fascinatingly, energy storage systems have been developed in
compactable sizes and shapes with sustainable and appreciable backup power.
However, due to some challenges in conventional storage systems, supercapacitors are
gaining a huge interest which satisfies the increasing demands of energy storage
devices. Supercapacitors are well-recognized for their long cycle life, high power
density, and the ability for less charge and discharge time. Accordingly, in
supercapacitor electrodes, activated carbon is extensively used as a base material.
Current research documented that the amorphous mixed metal oxides and
nanostructured oxides are also used in supercapacitor devices to exhibit high
performance. Keeping this in view, this chapter is reviewed to provide information on
the different types of recent developments in supercapacitors and their performance. In
addition, recent developments in green approaches to supercapacitor applications in
MnO2
-based electrodes and composites, supercapacitors performance, power
capability, and cycle life are also discussed.
Keywords: Activated carbon, And capacitary performance, Composites, Metal oxides, Power capability, Supercapacitors.
