One-step synthesis of nitrogen-doped graphene powders and application of them as high-performance symmetrical coin cell supercapacitors in different aqueous electrolyte


ARVAS M. B. , Karatepe N., GENÇTEN M. , ŞAHİN Y.

International Journal of Energy Research, 2022 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2022
  • Doi Number: 10.1002/er.7642
  • Journal Name: International Journal of Energy Research
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, PASCAL, Aerospace Database, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Environment Index, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Keywords: 2D materials, cyclic voltammetry, N-doped graphene powders, supercapacitor, Yucel's method, PENCIL GRAPHITE-ELECTRODES, OXYGEN REDUCTION REACTION, DOUBLE-LAYER CAPACITANCE, ELECTROCHEMICAL PERFORMANCE, EFFICIENT ELECTROCATALYST, HYBRID SUPERCAPACITORS, POTENTIAL APPLICATION, CYCLIC VOLTAMMETRY, POROUS CARBON, PARTICLE-SIZE

Abstract

© 2022 John Wiley & Sons Ltd.In this study, symmetric supercapacitors in the form of coin cells were produced by using N-doped graphene powders as electrode components. Nitrogen-doped graphene powders were prepared by Yucel's Method with cyclic voltammetry at different potential ranges for selective modification of the powders with functional groups. Electrochemical, spectroscopic, and microscopic characterizations of N-doped graphene powders were carried out. The formation of graphene layers was supported by scanning electron microscopy and Raman analysis. Functional groups formed on the surfaces of N-doped graphene powders were determined by X-ray photoelectron spectroscopy. Specific capacitances of symmetric supercapacitors prepared with N-doped graphene powders were determined by cyclic charge-discharge tests. The highest specific capacitance, energy and power values were determined as 235.3 F.g−1, 158.2 Wh.kg−1 and 1760 W.kg−1, respectively.