Article 2023 · 6 citations

Flexible supercapacitor electrodes based on modified binary metal phosphites on three dimensional graphene sponge

Ercarikci, Elif, Topcu, Ezgi, Kiransan, Kiransan Dagci

Abstract

In this paper, two flexible graphene-based materials were prepared by electrochemically depositing FeCoP and FeZnP on graphene sponges (GS) as self-standing electrodes for high-performance electrochemical capacitors. The structural and morphological properties of FeCoP/GS and FeZnP/GS electrodes were char-acterized using different spectroscopic techniques. As a result, the FeCoP/GS and FeZnP/GS electrodes de-monstrated a high specific capacitance of 2100 and 1100 F/g at 1.0 A/g, great cycling stability after 10,000 cycles maintaining 80 % and 74 % of its initial capacitance, respectively, which showed better performance than GS electrode. Moreover, two asymmetric supercapacitors were fabricated with FeCoP/GS and FeZnP/GS electrodes and GS; FeCoP/GS//GS and FeZnP/GS//GS circuits displayed a specific capacitance of 1100 and 780 F/g at 1.0 A/g and an outstanding energy density of 185 and 98 Wh/kg at a high power density of 5.6 and 3.8 kW/kg, respectively. Therefore, the as-fabricated electrodes hold great potential in the field of energy storage.(c) 2022 Published by Elsevier B.V.

Keywords

Graphene sponge material Iron phosphite Zinc phosphite Cobalt phosphite Asymmetric supercapacitors HIGH-PERFORMANCE ENERGY-STORAGE CARBON NANOTUBES ELECTROCHEMICAL PERFORMANCE ASYMMETRIC SUPERCAPACITOR HYBRID OXIDE NANOSTRUCTURES FABRICATION BINDER

WoS Categories

Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

Citation

Journal: JOURNAL OF ALLOYS AND COMPOUNDS
Year: 2023
Volume: 930
ISSN: 0925-8388
eISSN: 1873-4669
DOI: 10.1016/j.jallcom.2022.167305
WoS UID: WOS:000886104400002

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