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Highly enhanced capacitance of CuO nanosheets by formation of CuO/SWCNT networks through electrostatic interaction

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Abstract.
A series of uniform composite networks consisting of CuO nanosheets (NSs)/single-wall carbon nanotubes
(SWCNT) were fabricated through a facile and green method with the aid of electrostatic interaction in
aqueous solution. The capacitance was investigated by using various electrochemical methods including
cyclic voltammetry (CV), constant-current galvanostatic charge/discharge curves, and electrochemical
impedance spectroscopy. The CuO NSs/SWCNT networks show better specific capacitance (137.6 F g−1)
by CV at a scan rate of 2 mV/s compared to 71.0 F g−1 of CuO NSs, and 25.3 F g−1 of SWCNT. The CuO
NSs/SWCNT electrodes exhibit good cycling stability with effective specific capacitance of 59.3 F g−1 after
1000 cycles in a 6 M KOH aqueous solution at a current density of 5 A g−1, which is over two times
as 25.1 F g−1 of CuO NSs electrodes. CuO nanowires/SWCNT interpenetrating networks were also successfully
prepared, demonstrating a significant improvement of specific capacitance as well as cycling
stability. It is obvious that the homogenous dispersion of SWCNT in CuO NSs solution remarkably
improves their electrochemical performance.

Keywords:
CuO nanosheets
Nanowires
SWCNT composite networks
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 104 (2013) 289– 294

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

104 (2013)

Subjek

PSEUDOKAPASITOR

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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