Unveiling the electrochemical advantages of a scalable and novel aniline-derived polybenzoxazole-reduced graphene oxide composite decorated with manganese oxide nanoparticles for supercapacitor applications

Khan, M. S., Murtaza, I., Shuja, A., Asghar, M. A., Garcia Nunez, C. , Abid, R., Haider, A. and Faraz, M. (2023) Unveiling the electrochemical advantages of a scalable and novel aniline-derived polybenzoxazole-reduced graphene oxide composite decorated with manganese oxide nanoparticles for supercapacitor applications. Journal of Energy Storage, 73(C), 109109. (doi: 10.1016/j.est.2023.109109)

Abstract

In the quest for better supercapacitor performance, materials with high energy storage, rapid charge transfer and excellent charge-discharge capabilities are crucial. However, improving energy density and optimizing electrode materials for supercapacitors remains a challenge. Within this perspective, we developed a novel aniline-derived polybenzoxazole-reduced graphene oxide composite (Mn3O4-pBOA-rGO) for supercapacitor applications. An electrode for supercapacitor applications was then fabricated using the synthesized composite. Various characterization techniques, such as X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy, were employed to analyze the structure of the material and cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge tests were performed to evaluate the supercapacitive performance. Remarkably, the Mn₃O₄-pBOA-rGO ternary nanocomposite-based electrode exhibited enhanced electrochemical performance achieving an energy density of 116 Wh kg−¹ in a 1 M aqueous Na2SO4 electrolyte at a current density of 1 A g−¹. In comparison, the Mn₃O₄-pBOA binary nanocomposite recorded an energy density of 25 Wh kg−¹, while bare Mn₃O₄ yielded 10 Wh kg−¹. The significantly improved electrochemical properties of the Mn₃O₄-pBOA-rGO composite present a promising and viable solution for supercapacitor applications.

• Item Type: Articles
• Additional Information: We would like to acknowledge funding from Higher Education Commission Pakistan and British Council, UK (Grant No. 20-ICRG-165/RGM/HEC/2020) under Pak-UK Education Gateway program.
• Keywords: Nanocomposite, supercapacitor, manganese oxide, reduced graphene oxide, polyaniline, specific capacitance, energy density, power density.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Garcia Nunez, Dr Carlos
• Authors: Khan, M. S., Murtaza, I., Shuja, A., Asghar, M. A., Garcia Nunez, C., Abid, R., Haider, A., and Faraz, M.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Journal of Energy Storage
• Publisher: Elsevier
• ISSN: 2352-152X
• ISSN (Online): 2352-1538
• Published Online: 30 September 2023
• Copyright Holders: Copyright © 2023 Elsevier
• First Published: First published in Journal of Energy Storage 73(C):109109
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher