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Preparation and characterization of nanostructured NiO/MnO2 composite electrode for electrochemical supercapacitors

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A B S T R A C T
Nanostructured nickel–manganese oxides composite was prepared by the sol–gel and the chemistry
deposition combination new route. The surface morphology and structure of the composite were
characterized by scanning electron microscope and X-ray diffraction. The as-synthesized NiO/MnO2
samples exhibit higher surface area of 130–190 m2 g1. Cyclic voltammetry and galvanostatic charge/
discharge measurements were applied to investigate the electrochemical performance of the composite
electrodes with different ratios of NiO/MnO2. When the mass ratio of MnO2 and NiO in composite
material is 80:20, the specific capacitance value of NiO/MnO2 calculated from the cyclic voltammetry
curves is 453 F g1, for pure NiO and MnO2 are 209, 330 F g1 in 6 mol L1 KOH electrolyte and at scan
rate of 10 mV s1, respectively. The specific capacitance of NiO/MnO2 electrode is much larger than that
of each pristine component. Moreover, the composite electrodes showed high power density and stable
electrochemical properties.
Keywords:
A. Oxides
B. Sol–gel chemistry
C. Electrochemical measurements
D. Electrochemical properties

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Informasi Detail

Judul Seri

Materials Research Bulletin

No. Panggil

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Penerbit

: Elsevier Ltd. All rights reserved., 2008

Deskripsi Fisik

Materials Research Bulletin 44 (2009) 1122–1126

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

Info Detail Spesifik

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Pernyataan Tanggungjawab

yuli/agus

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