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

• Published in: Journal of materials science. Materials in electronics Vol. 28; no. 24; pp. 18489 - 18496
• Main Authors: Dharmalingam, P., Ramanan, V., Karthikeyan, G. G., Palani, N. S., Ilangovan, R., Ramamurthy, P.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2017; Springer Nature B.V
• Subjects: Alternative energy; Capacitance; Carbon; Carbon dots; Characterization and Evaluation of Materials; Chemistry and Materials Science; Electrochemical analysis; Electrodes; Electrolytes; Energy conversion; Energy storage; Ethanol; Graphene; Lasers; Lignite; Materials Science; Nanotechnology; Nitrogen; Optical and Electronic Materials; Optoelectronics; Precursors; Quantum dots; Solvents; Supercapacitors; X-rays
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-7796-3

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.