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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/039/01/0241-0248

    • Keywords

       

      Electrode; nanoparticles; carbon soot; functionalized carbon; supercapacitor.

    • Abstract

       

      The electrochemical supercapacitor behaviour of bare, washed and nitric acid functionalized candle flame carbon soots were reported. Crystallinity and the morphology of the candle soots were recorded using X-ray diffraction analysis, scanning and transmission electron microscopy, respectively. The nitric acid functionalized candle soot showed an improved Brunauer–Emmett–Teller surface area of 137.93 from 87.495 m$^2$ g$^{−1}$ of washed candle soot. The presence of various functional groups in candle soots and the development of oxygen functionalities in the functionalized candle soot were examined through Fourier transform infrared spectroscopy and energy-dispersive X-ray analysis. Raman spectra showed the characteristic peaks corresponding to the D (diamond) and G (graphite) phase of carbon present in the candle soots. The electrochemical characterization was performed by cyclic voltammetry, galvanostatic charge/discharge test and impedance spectroscopy in 1MH2SO4 electrolyte. The functionalized candle soot electrode showed an enhanced specific capacitance value of 187 F g$^{−1}$ at 0.15 A g$^{−1}$ discharge current density, which is much higher than that of bare and washed candle soot electrodes.

    • Author Affiliations

       

      C Justin Raj1 Byung Chul Kim1 Bo-Bae Cho1 Won-Je Cho1 Sung-Jin Kim2 Sang Yeup Park2 Kook Hyun Yu1

      1. Department of Chemistry, Dongguk University-Seoul, Seoul 100 715, Republic of Korea
      2. Department of Ceramic Engineering, Gangneung-Wonju National University, Gangneung 210 702, Republic of Korea
    • Dates

       

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