Between the Electrodes of a Supercapacitor: An Update on Electrolytes

Abstract

Performance, in particular power capabilities and stability, of a supercapacitor critically depend on the electrolyte: the ionically conducting phase between the electrodes of a supercapacitor. This review provides an overview with particular attention to possible practical perspectives and promising developments. It addresses all studied or suggested electrolyte systems, mentions relevant properties and highlights details possibly important for practical use or posing likely problems.