Conducting Polymer-Based Ternary Composites for Supercapacitor Applications

Abstract

Conducting polymers are a well-established source of pseudocapacitance and a deserving candidate for supercapacitor electrode material because of their high storage capacity, high conductivity when doped, high potential window, high energy density, environment-friendliness, low cost, and easy synthesis. The growth of supercapacitor electrode materials, primarily focusing on the conducting polymer-based ternary nanocomposites with carbon nanomaterials. To improve the energy density, ternary nanocomposites have been designed possessing both the charge storage mechanisms, which are Electric Double-Layer Capacitor (EDLC) and pseudocapacitance, without sacrificing the other important supercapacitor parameters. The concept of EDL capacitance was first explained by H. I. Becker in 1957, where he used a porous carbon material and an aqueous electrolyte. A capacitor is a charge storage device that stores energy by separating positive and negative charges with the help of an electric field and releases energy in the form of electrical energy.