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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/046/0048

    • Keywords

       

      Nanocomposites; polymeric composites; energy storage and conversion.

    • Abstract

       

      MgO/few-layer graphene (FLG) nanocomposite is proven as an excellent electrode in aqueous supercapacitors (AS). The synergy between the pseudo-capacitive MgO and the double-layer charging nature of FLG that enhances the supercapacitors’ specific capacitance (SC) was successfully tested. The SC could be further enhanced by combining MgO/FLG with a third component, such as a conducting polymer (with a Faradaic type of charge storage capability). Herein, such an attempt has been made. MgO/FLG was uniformly filled in polyaniline (PANI) by using a simple in situ polymerization method. X-ray diffraction, electron microscopy, and Raman and Fourier transform infrared spectroscopic analyses clearly showed the formation of a ternary nanocomposite constituted by MgO, FLG and PANI. As anticipated, the ternary nanocomposite (MgO/ FLG-filled PANI (MFP)) exhibited an enhanced SC (compared to MgO/FLG) when tested as electrode material in AS. The MFP composite was evaluated for SC using a 3-electrode system. MFP composite exhibited a maximum SC of 347 F g$^{-1}$ when tested at a scan rate of 5 mV s$^{-1}$ using 1 M aqueous H$_2$SO$_4$ as the electrolyte. The electrode material assumable with symmetric capacitance achieved a maximum capacitance of 396 F g$^{-1}$ at a current density of 1 A g$^{-1}$ and showed a capacitance retention of 81%. In contrast, MgO/FLG exhibited much lower values under similar testing conditions.

    • Author Affiliations

       

      DINESH BEJJANKI1 SAMPATH KUMAR PUTTAPATI1 HARITA PANT2 VADALI V S S SRIKANTH2

      1. Department of Chemical Engineering, National Institute of Technology, Warangal 506004, India
      2. School of Engineering Sciences and Technology, University of Hyderabad, Hyderabad 500046, India

    • Dates

       
      Published
      4 March 2023
      Manuscript received
      7 August 2022
      Accepted
      4 November 2022
      Final version published online
      4 March 2023

  • Bulletin of Materials Science | News

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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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