e-journal

Graphene based supercapacitor fabricated by vacuum filtration deposition

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Abstract.
A novel method involving vacuum filtration deposition (VFD) of graphene suspension is developed in
this study to fabricate graphene based nickel foam electrode for supercapacitor. Acid-treated graphene
nanosheets in a suspension can be easily deposited in the pores of nickel foam in large quantity using
this method, thus producing supercapacitors with large energy capacity. Structural and morphological characterizations
of as prepared electrodes have been carried out using scan electron microscopy (SEM),
energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and Raman
spectroscopy. Electrochemical performance of as prepared electrode has also been investigated through
cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge analyzer,
in comparison with electrodes prepared via existing technique. Our results demonstrated that the
new electrode, while achieving much greater energy capacity due to large active substance incorporated,
still maintains a relatively high power density and a good cycle performance in 6 M KOH electrolyte.
Our results also demonstrated that a supercapacitor made of the existing electrophoretic deposition
based electrodes will lose its entire capacitance after certain time period (20 days in our study); whereas
the VFD based one retains virtually all its performance after the same period. The present study shows
the potential application of this method for fabrication of supercapacitor with much improved energy
capacity.

Keywords:
Electrophoretic deposition
Graphene nanosheets
Supercapacitor
Vacuum filtration deposition

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2012

Deskripsi Fisik

Journal of Power Sources 206 (2012) 476– 482

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

Versi lain/terkait

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