e-journal

Structural evolution of multi-walled carbon nanotube/MnO2 composites as supercapacitor electrodes

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Abstract.
Multi-walled carbon nanotube (MWCNT)/MnO2 supercapacitor electrodes containing MnO2 nanoflakes
in the MWCNT network are fabricated through the oxidation of manganese acetate with poly(4-
styrenesulfonic acid) (PSS) dispersed MWCNTs. The structural evolution of the electrodes under
charge/discharge (reduction/oxidation) cycles and its impact on the electrodes’ electrochemical properties
are evaluated. Structural evolution involves the dissolution of MnO2 upon reduction, the diffusion
of the reduced Mn species from the MWCNT network toward the electrolyte solution, and the deposition
of MnO2 on the electrode surface upon oxidation. Electrode structural changes, including the electrode
dissolution and the growth of the MnO2 crystals, are scan rate dependent and have deteriorating effect
on the electrode’s electrochemical properties including the specific capacitance and cyclic stability.

Keywords: Multi-walled carbon nanotube, Manganese oxide, Charge/discharge cycles, Structural evolution, Supercapacitor

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2012

Deskripsi Fisik

Electrochimica Acta 59 (2012) 548– 557

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

FISIKA MATERIAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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