Article Proceedings Paper 2022 · 5 citations

Design of metal phosphite decorated sponge materials for high-performance flexible battery-type supercapacitors

Ercarikci, Elif, Aksu, Zeris, Topcu, Ezgi, Kiransan, Kader Dagci

Abstract

In this work, iron and zinc phosphite [FeP and Zn3P2 (ZnP)] crystals were individually decorated on a flexible, freestanding, and three-dimensional (3D) graphene sponge material (GSM) through a facile and cost-effective electrodeposition method. With the synergistic effect between metal phosphite (MP) particles and graphene, 3D FeP/GSM and ZnP/GSM electrodes displayed excellent electrochemical performances with high specific capacitances of 1872 and 908 F/g at a current density of 1 A/g and remarkable cycling stabilities (85% and 70% retention after 10 000 cycles), respectively. Owing to their superior properties, two asymmetric supercapacitor (ASC) circuits were assembled by employing FeP/GSM and ZnP/GSM as the positive electrodes and GSM as the negative electrode. The FeP/GSM//GSM and ZnP/GSM//GSM ASCs exhibited high energy densities of 265 and 62 Wh/kg with high power densities of 5545 and 3050 W/kg, respectively. Furthermore, as-designed devices showed great stability as retaining 80% and 70% of their initial capacitance after a consecutive 10 000 cycles of galvanostatic charge-discharge processes. These results demonstrated that MP/GSMs can be used as promising electrode materials for flexible ASC applications.

Keywords

asymmetric supercapacitors graphene sponge material iron phosphite zinc phosphite REDUCED GRAPHENE OXIDE FACILE SYNTHESIS ELECTROCHEMICAL PERFORMANCE ASYMMETRIC SUPERCAPACITOR 3-DIMENSIONAL GRAPHENE ELECTRODE MATERIAL COBALT PHOSPHIDE CARBON NANOTUBES ENERGY-STORAGE NANOCOMPOSITE

WoS Categories

Energy & Fuels Nuclear Science & Technology

Citation

Journal: INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Year: 2022
Volume: 46
Issue: 15
Pages: 21661-21678
ISSN: 0363-907X
eISSN: 1099-114X
DOI: 10.1002/er.8653
WoS UID: WOS:000849507800001

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