High power density supercapacitor devices based on nickel foam-coated rGO/MnCo2O4 nanocomposites
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Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media Deutschland GmbH
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
Açıklama
Anahtar Kelimeler
Electrochemical performance, Manganese cobaltite, Nickel foam, Reduced graphene oxide, Supercapacitor, Cobalt compounds, Cost effectiveness, Cyclic voltammetry, Electrochemical impedance spectroscopy, Energy storage, Graphene, Manganese compounds, Potassium hydroxide, Reduced Graphene Oxide, Supercapacitor, Charge/discharge cycle, Electroactive material, Electrochemical measurements, Electrochemical performance, Galvanostatic charge/discharge, High specific capacitances, Nanocomposite electrodes, Reduced graphene oxides (RGO), Foams
Kaynak
Ionics
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
26
Sayı
11
