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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/044/0179

    • Keywords

       

      Quick response; relaxation time; supercapacitance; durability; rate capability.

    • Abstract

       

      The quick responsive and durable supercapacitive performance was achieved from reduced graphene oxide/ zinc hydroxide/polyaniline (rGO5.88%/Zn(OH)$_2$11.77%/PANI82.35%) (GZnP82) nanocomposite, synthesized by in-situ single step. The GZnP82 provided a specific capacitance ($C_s$) of 173.60 F g$^{–1}$, a specific capacity ($Q$) of 208.32 C g$^{–1}$, a specific energy of 34.7220 W h kg$^{–1}$ and a specific power of 1516.8 W kg$^{–1}$ at 0.25 A g$^{–1}$. The GZnP82 exhibits only 28% decay of its initial $C_s$ up to 12500 cycles at 2 A g$^{–1}$. The GZnP82 is fast in response with the relaxation time (${\tau}$) of 1.52 s. The capacitance of GZnP82 device obtained from impedance spectroscopy is 1.29 F. The comparison of electrochemical performance of GZnP82 measured from both chronopotentiometry and impedance spectroscopy, with similar reported energy storage materials, apprises that the achieved performances are of similar order; and better than, the reported materials. Most importantly, the addition of Zn(OH)$_2$ has rendered the negative contribution to the GZnP82, as the binary combination of it, the rGO/PANI furnished higher performances than the GZnP82.

    • Author Affiliations

       

      ARANGANATHAN VISWANATHAN1 ADKA NITYANANDA SHETTY1 S P BHARATH2 K MAHENDRA3

      1. Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, India
      2. Centre for Nano and Soft Matter Science, Bengaluru 560013, India
      3. Department of Physics, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, India

    • Dates

       
      Published
      10 June 2021
      Manuscript received
      14 December 2020
      Accepted
      27 March 2021
      Final version published online
      10 June 2021

    • Supplementary Material

       

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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