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Behavior of NiO–MnO2/MWCNT composites for use in a supercapacitor

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Abstract.
NiO–MnO2/MWCNT composite was formed by a simple chemical precipitation method using a chelating
agent and Ni and Mn hydroxides on MWCNT. The NiO–MnO2/MWCNT was pretreated by ultrasonication,
followed by thermal annealing at 300 ◦C. The material obtained was applied as an electrode in a supercapacitor.
FT-IR, EDS, XRD, FE-SEM and FE-TEM were used to characterize the structural features. The results
show that a nanosized NiO–MnO2 layer covered the surface of the MWCNT, and the original structure of
the MWCNT was retained during the coating process. The capacitive behavior of the NiO–MnO2/MWCNT
electrode was investigated by cyclic voltammetry and galvanostatic charge/discharge methods in a 6 M
KOH aqueous solution. The cyclic voltammetry curves demonstrated that the maximum specific capacitance
of the NiO–MnO2/MWCNT electrode was 193.50 F g−1, which is significantly higher than that of an
MWCNT electrode. The results show that both the MWCNT and NiO–MnO2/MWCNT electrodes exhibited
capacitive behaviors, and the NiO–MnO2 layer increased the capacitance of the supercapacitor.

Keywords:
Electrochemical properties
Composite materials
Coatings

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Informasi Detail

Judul Seri

Materials Chemistry and Physics

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2011

Deskripsi Fisik

Materials Chemistry and Physics 130 (2011) 507– 512

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

130 (2011)

Subjek

PSEUDOKAPASITOR

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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