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A study on the electrochemical performance of nitrogen and oxygen co-doped carbon dots derived from a green precursor for supercapacitor applications

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Abstract

Carbon dots (CDs) finds applications in the field of optoelectronics, energy conversion, energy storage, etc. In this work, the electrochemical properties of CDs (obtained from a green source, lignite) were established to employ them for supercapacitor application. CDs-modified carbon felt working electrode was fabricated and its electrochemical properties were studied and compared with lignite-modified carbon felt working electrode. The CDs-modified electrode showed a superior capacitance compared with lignite-modified electrode which was evidenced from their cyclic voltammograms, electron impedance spectroscopy, and charge/discharge studies. The highest observed specific capacitance value for CDs-based electrode is 30.5 F g−1 which is 14 times higher than that of lignite-modified electrode.

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Authors and Affiliations

  1. National Centre for Ultrafast Processes, University of Madras, Taramani, Chennai, 600113, India

    P. Dharmalingam, V. Ramanan & P. Ramamurthy

  2. Department of Chemistry, Anna University, Chennai, 600 025, India

    G. G. Karthikeyan

  3. Nanoelectronics Lab, Department of Nanoscience and Technology, Alagappa University, Karaikudi, 630 004, India

    N. S. Palani

  4. National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai, 600025, India

    R. Ilangovan

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  1. P. Dharmalingam
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  2. V. Ramanan
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  3. G. G. Karthikeyan
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  4. N. S. Palani
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  5. R. Ilangovan
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  6. P. Ramamurthy
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Correspondence to P. Ramamurthy.

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Dharmalingam, P., Ramanan, V., Karthikeyan, G.G. et al. A study on the electrochemical performance of nitrogen and oxygen co-doped carbon dots derived from a green precursor for supercapacitor applications. J Mater Sci: Mater Electron 28, 18489–18496 (2017). https://doi.org/10.1007/s10854-017-7796-3

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  • DOI: https://doi.org/10.1007/s10854-017-7796-3

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