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Unleashing the Potential: Augmented Supercapacitor Performance of Bi2O3/MnO2@MWCNT Nanocomposites with Redox Additive Electrolyte

  • Velmurugan Shanmugapriya
    Velmurugan Shanmugapriya
    Multifunctional Materials Laboratory, Department of Physics, International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil 626126, Tamil Nadu, India
  • Gubendran Hariharan
    Gubendran Hariharan
    Multifunctional Materials Laboratory, Department of Physics, International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil 626126, Tamil Nadu, India
  • Sasikala Ganapathy
    Sasikala Ganapathy
    Crystal Growth Centre, Anna University, Chennai 600025, Tamil Nadu, India
  • Sambandam Bharathi
    Sambandam Bharathi
    NGSeq Analytics LLC, San Diego, California 92071, United States
  • , and 
  • Ayyaswamy Arivarasan*
    Ayyaswamy Arivarasan
    Multifunctional Materials Laboratory, Department of Physics, International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil 626126, Tamil Nadu, India
    *Email: [email protected]
Cite this: Energy Fuels 2023, 37, 24, 19925–19938
Publication Date (Web):December 1, 2023
https://doi.org/10.1021/acs.energyfuels.3c03472
Copyright © 2023 American Chemical Society

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    Abstract

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    The current era’s energy demand emphasizes the necessity of advancements in smart and efficient technologies for the conversion and storage of energy. Thereby, supercapacitors were fabricated based on the nanocomposites (NCs) of Bi2O3/MnO2 (BM) and Bi2O3/MnO2@MWCNT (BMM), and their electrochemical performances were documented. BM and BMM NCs were prepared by a one-pot hydrothermal process. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HR-TEM) analyses were utilized to examine the physicochemical characteristics of the synthesized NCs. Working electrodes were fabricated using BM and BMM NCs and a three-electrode setup was employed to investigate their electrochemical characteristics with 1 M KOH and 0.1 M K4[Fe(CN)6]-added 1 M KOH (RAE) aqueous electrolytes. In RAE, the BMM NC-modified working electrode attained a maximum specific capacitance of 1768 F g–1 at 10 mV s–1. Subsequently, asymmetrical supercapacitors were fabricated by assembling a cathode consisting of BM- and BMM-modified working electrodes, respectively, and an anode composed of Ni foam modified with rGO. Device performances were evaluated in a two-electrode configuration using KOH and RAE. The BMM NC-based device exhibited energy and power densities of 8.21 Wh kg–1 and 340 W kg–1, respectively, in KOH. These values were enriched to 21.24 Wh kg–1 and 1400 W kg–1, respectively, by the addition of 0.1 M K4[Fe(CN)6] in KOH. Since the prepared BMM NCs revealed better performances in RAE, the proposed BMM NC and RAE combination served as a better candidate for real-time energy storage applications.

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    Cited By

    This article is cited by 1 publications.

    1. Moumita Saha, Ambrish Kumar, Rahul Kanaoujiya, Kamalakanta Behera, Shruti Trivedi. A Comprehensive Review of Novel Emerging Electrolytes for Supercapacitors: Aqueous and Organic Electrolytes Versus Ionic Liquid-Based Electrolytes. Energy & Fuels 2024, 38 (10) , 8528-8552. https://doi.org/10.1021/acs.energyfuels.4c00685