INTERNATIONAL JOURNAL OF ENERGY RESEARCH, vol.46, no.6, pp.7348-7373, 2022 (SCI-Expanded)
Article / Article
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Science Citation Index Expanded (SCI-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
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
Istanbul Technical University Affiliated:
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.