Binary nanocomposites of reduced graphene oxide and cobalt (II, III) oxide for supercapacitor devices
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Dosyalar
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor and Francis Ltd.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, a simple and one-step cost-effective preparation of rGO/Co3O4 nanocomposite was given out in different monomer concentrations of [rGO]o/[Co3O4]o= 1:1; 1:2; 1:5 and 1:10. The electroactive materials were characterized by many techniques, such as FTIR-ATR, XPS, TGA-DTA, Raman, BET surface analysis, GCD, SEM-EDX, XRD, TEM, CV, and EIS analysis. A symmetric supercapacitor applying rGO/Co3O4 nanocomposite as positive and negative electrodes was taken in the potential window between 0.0 and 0.8 V as the highest specific capacitance of Csp= 115.35 F×g-1 at 2 mV×s-1 for [rGO]o/[Co3O4]o= 1:2. Furthermore, the highest energy (E) and power densities (P) were obtained as E= 20.16 Wh×kg-1 at 40 mA and P= 26.140 kW×kg-1 at 10 mA for [rGO]o/[Co3O4]o= 1:2 by GCD method, respectively. As a result, rGO/Co3O4 nanocomposite at different monomer concentrations showed an easy synthesis, a sustainable approach, and a high electrochemical performances for energy storage devices. © 2021 Informa UK Limited, trading as Taylor & Francis Group.
Açıklama
Anahtar Kelimeler
Co3O4, energy density, nanocomposite, reduced graphene oxide, Supercapacitor, Cobalt, Cost effectiveness, Energy storage, Graphene, Graphene devices, Monomers, Supercapacitor, Surface analysis, Cobalt(ii ,iii) oxide, Electroactive material, Electrochemical performance, Monomer concentration, Negative electrode, Potential windows, Power densities, Specific capacitance, Reduced Graphene Oxide
Kaynak
Materials Technology
WoS Q Değeri
Q3
Scopus Q Değeri
Q2