Binary nanocomposites of reduced graphene oxide and cobalt (II, III) oxide for supercapacitor devices

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Küçük Resim

Tarih

2021

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

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