Electrode Materials for Electrochemical Capacitors: An Overview

Abstract

This review, mainly paid attention to how supercapacitor electrodes are made in order to increase energy transfer and storage, so that, superior performance energy and power density  can be gained as excellent operating conditions plus long cycling life is attained. Review shows that specific capacitance of supercapacitor is influenced by electrolyte accessibility, pore size distribution, and structure, electrolyte type, pore shape plus electrical conductivity also affects it. Instrumental analysis of performance of electrode materials was looked into by means of supercapacitor evaluation techniques like CV, EIS and galvanostatic charge/discharge. We understood from review that solvent used in making of electrolytes has enormous effect on it working voltage; the electrolyte–electrode relations with ionic conductivity of electrolyte were shown to have participated very much in internal resistance of SCs. In conclusion, studies on electrode materials for SCs in general, have significantly progressed and have brought lots of innovative improvements in supercapacitors proficiency and application; but, further studies on optimization of energy density and power density of EC need to be carried out while their weight, volume and production expenditure require reduction.