Redox Active Electrolytes in Supercapacitors

Supercapacitors are highly promising for future electrochemical energy storage systems due to their excellent energy density, power density, and cycling life. Most of the research in supercapacitors is focused on the development of electrode material. The incorporation of redox-active electrolytes in supercapacitors can greatly enhance charge storage. Redox-active electrolytes received considerable attention due to their ability to undergo faradaic reactions that significantly enhance energy storage performance. This chapter discusses various types of redox mediators employed to fabricate supercapacitors, their charge storage mechanism, classification, performance evaluation, advantages, and disadvantages. Various methods used for electrolyte incorporation, challenges in the development, and the future scope are also discussed in this chapter.