α-Manganese Dioxide (α-MnO2) Coated with Polyaniline (PANI) and Reduced Graphene Oxide (rGO)-Based Nanocomposite for Supercapacitor Application

Author:

Patil Pranoti H.1,Kulkarni Vidya V.1,Dongale Tukaram D.2,Jadhav Sushilkumar A.1ORCID

Affiliation:

1. School of Nanoscience and Technology, Shivaji University Kolhapur, Vidyanagar, Kolhapur 416004, India

2. Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Technology, Shivaji University, Kolhapur 416004, India

Abstract

This work reports the preparation and testing of a composite material composed of α-Manganese dioxide (α-MnO2) coated with polyaniline (PANI) and reduced graphene oxide (rGO) for supercapacitor application. The structure and morphology of the materials were characterized by using X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Raman spectroscopy. The electrochemical performances of the materials were investigated by using cyclic voltammetry (CV), Galvanostatic charge–discharge (GCD), cyclic stability and electrochemical impedance spectroscopy (EIS). The α-MnO2-coated PANI/rGO nanocomposite exhibited a specific capacitance of 261 F g−1 at the scan rate of 5 mV s−1 with 75% capacitance retention after 2000 cycles at 5 A g−1. It showed a specific energy of 11 W h kg−1 and specific power of 1250 W kg−1.

Publisher

MDPI AG

Subject

Engineering (miscellaneous),Ceramics and Composites

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