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High power density supercapacitor devices based on nickel foam–coated rGO/MnCo2O4 nanocomposites

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Abstract

New nanocomposite electrode material of rGO/MnCo2O4 was freely loaded on flexible substrate on nickel foam and prepared by a simple, cost-effective, and eco-friendly pathway. The results show that the spinel manganese cobaltite (MnCo2O4) with reduced graphene oxide (rGO) nanocomposite forms a uniform deposit and densely covers on the nickel foam (NF). The electrochemical measurements were investigated in three methods, such as cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). The synergistic effects from rGO and MnCo2O4 deliver outstanding an excellent electrochemical performance that was not realized by any of these components alone. The electroactive material exhibits a high specific capacitance of Csp = 808 F/g at 2 mV/s in 1 M KOH solution. Furthermore, this device delivers an excellent power density of P = 7658 W/kg and a high energy density of E = 15.2 Wh/kg. More importantly, cycling retention is 135% after 1000 charge/discharge cycles. This study proposes that the as-prepared (rGO/MnCo2O4)/nickel foam has a potential application and a promising candidate for energy storage devices.

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Funding

The authors received financial support from the Ministry of Higher Education and Scientific Research of Tunisia. Achref Chebil has studied in Ates polymer research group between 23 May 2019 and 7 August 2019 in Tekirdag Namik Kemal University, Turkey.

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Authors and Affiliations

  1. NANOMISENE Laboratory, LR16CRMN01, Centre for Research on Microelectronics and Nanotechnology CRMN of Technopark of Sousse, B.P. 334, Sahloul, 4034, Sousse, Tunisia

    Achref Chebil & Cherif Dridi

  2. University of Sousse, High School of Sciences and Technology of Hammam, Sousse, Tunisia

    Achref Chebil & Cherif Dridi

  3. Atespolymer Research group, Department of Chemistry, Faculty of Arts and Sciences, Tekirdag Namik Kemal University, Degirmenalti Campus, 59030, Tekirdag, Turkey

    Ozge Kuzgun & Murat Ates

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  1. Achref Chebil
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  2. Ozge Kuzgun
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Chebil, A., Kuzgun, O., Dridi, C. et al. High power density supercapacitor devices based on nickel foam–coated rGO/MnCo2O4 nanocomposites. Ionics 26, 5725–5735 (2020). https://doi.org/10.1007/s11581-020-03713-3

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