Journal of Chemical Engineering & Process Technology
Open Access

Abstract

An advanced asymmetric supercapacitor based on microcubical Pb@Mno2 and PANI/GNP hybrids showing excellent electrochemical performances

Amit Kumar Das

Metal Organic Framework (MOF) based super capacitor is one of the gifted energy storage devices for future portable electronics. Here, we report in detail the design and low-cost fabrication of an advanced asymmetric super capacitor (ASC) assembled with the prussian blue (PB)/MnO2 (PB@MnO2) hybrid as the positive electrode and the polyaniline (PANI)/graphene nanopatelets (GNP) (PG) hybrid as the negative electrode with aq. KNO3 electrolyte. Both the electrodes were made by the coating of the respective electro active materials on the conducting stainless steel (SS) fabric current collector. The MOF based positive electrode, PB@MnO2 hybrid was synthesized via reducing agent assisted chemical bath deposition of MnO2 Nano layer on the faradaic PB micro cubes and shows an appreciable specific capacitance (Csp) of 608 F g-1 at 1 A g-1 current density and the as-fabricated PB@MnO2//PG ASC device furnishes favorable Csp of 98 F g-1 at 1 A g-1. Moreover, this ASC device exhibits noteworthy energy density of 16.5 Wh Kg-1 at the power density of 550 W Kg-1 along with remarkable long cycling life (retention of 93% capacitance even after 4000 charge-discharge cycles). Thus, the obtained results manifest great potential of the ASC device for exploring state-of-the-art futuristic applications as an advanced energy storage system

Published Date: 2021-05-15; Received Date: 2020-10-14