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Graphene-beaded carbon nanofibers for use in supercapacitor electrodes: Synthesis and electrochemical characterization

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Abstract.
This paper studies the synthesis and electrochemical characterization of novel graphene-beaded carbon
nanofibers (G/CNFs) as electrode material for use in supercapacitor. The porous G/CNF films were prepared
by electrospinning polyacrylonitrile (PAN)/N,N-dimethylformamide (DMF) solution dispersed with
oxidized graphene nanosheets, followed by carbonization at 800
C in a tubular quartz furnace. The
morphology and chemical structure of the porous G/CNF films were characterized by means of scanning
electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. The electrochemical behavior of the synthesized G/CNF films as supercapacitor electrodes was characterized by
means of cyclic voltammetry (CV), galvanotactic charge/discharge, and electrochemical impedance test in
a 6 M KOH aqueous electrolyte. Electrochemical measurements revealed that the maximum specific
capacitance of the porous G/CNF electrodes reached up to 263.7 F g-1 at a discharge current density
100 mA g-1. Furthermore, the supercapacitor exhibited very good cycling stability of energy storage with
the retention ratio of 86.9% after 2000 cycles. The high electrochemical performance of the G/CNF electrodes
was attributed to the unique nanostructural configuration, high electrical conductivity, and large
specific surface area of the graphene nanosheets.

Keywords: Supercapacitor, Graphene, Carbon nanostructures, Carbon nanofibers, Electrospinning, Electrode materials

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Journal of Power Sources 222 (2013) 410-416

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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