Effect of Electrolyte on the Performance of Supercapacitors

Abstract

Various ecological issues as well as current energy crisis motivate the research for proficient energy resources. A majority of the present energy resources are intermittent and consequently there is an urgent need of proficient energy storage technologies. Supercapacitors gained tremendous scientific interest owing to their various significant advantages. Electrolyte constitutes one of the most important roles in electrochemical supercapacitors as their chemical and physical properties influence various essential factors like capacitance, power density, rate performance, as well as cyclic life. It provides ionic conductivity and influences the transfer and balance of charges between cathode and anode. Electrolytes are categorized into various types, such as aqueous, solid-state or quasi solid-state, and redox-active electrolytes. This review deals with the effect of electrolyte properties on performance of an electrochemical supercapacitor for building highly efficient supercapacitors for the competitive market of energy storage devices.