Abstract

Numerous electrolytes based on aqueous and organic solvents, ionic liquids, inorganic materials, and polymeric matrices are used for microsupercapacitor (MSC) devices. Although solid-state electrolytes (SSEs) have been used in MSCs, most of the reports available in the literature are dominated by gel polymer electrolytes (GPEs) and liquid electrolytes. This chapter aims to shine a light on the various types of electrolytes that have been widely employed in the fabrication of MSCs. The chapter is segregated into different sections where the first section explains the use of inorganic solid electrolytes (ISEs) for MSCs followed by the next section that provides insights into liquid electrolytes. The subsequent sections are dedicated to the discussions on the significance of polymer electrolytes (PEs) and ionogels in MSC technology. The last section however summarizes the challenges and future perspectives of all-solid-state MSCs’ development.

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