e-journal

Manganosite–microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications

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Abstract.
Graphene based materials coupled with transition metal oxides are promising electrode materials in
asymmetric supercapacitors owing to their unique properties which include high surface area, good
chemical stability, electrical conductivity, abundance, and lower cost profile over time. In this paper a
composite material consisting of graphene oxide exfoliated with microwave radiation (mw rGO), and
manganosite (MnO) is synthesised in order to explore their potential as an electrode material. The composite
material was characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray
photoelectron spectroscopy (XPS), and Raman spectroscopy. Cyclic voltammetry (CV) and electrochemical
impedance spectroscopy (EIS) were used to explore the process occurring at the electrode/electrolyte
interface. Long term cyclability and stability were investigated using galvanostatic charge/discharge testing. From the resulting analysis, an asymmetric supercapacitor was constructed with the best composite
containing 90% MnO–10% mw rGO (w/w). The device exhibited a capacitance of 0.11 F/cm2 (51.5 F/g by
mass) and excellent capacity retention of 82% after 15,000 cycles at a current density of 0.5 A/g.

Keywords: Microwave exfoliated graphene oxide, Manganosite, Asymmetric supercapacitor

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Ketersediaan

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2013

Deskripsi Fisik

Electrochimica Acta 101 (2013) 99– 108

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA MATERIAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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