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Hollow spheres of nanocarbon and their manganese dioxide hybrids derived from soft template for supercapacitor application

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Abstract.
A facile soft templating strategy has been developed for synthesizing hollow spheres of nanocarbon by
hydrothermal process. In this soft templating strategy, poly (ethylene oxide)epoly (propylene oxide)
epoly (ethylene oxide) block co-polymers are used as the template while α-cyclodextrin are employed as
the carbon precursor. After hydrothermal treatment, the soft templates can be easily removed by pyrolysis
of the as-prepared hollow spheres in argon. The resultant hollow spheres of nanocarbon exhibit
both micro- and meso-pores in carbon wall with a specific surface area of ~380 m2 g-1. Upon incorporation
of permanganate (MnO4-) into the hollow carbon spheres, nanocrystalline manganese dioxide (MnO2) is grown on the carbon surface, where the redox reaction between carbon and MnO4-  takes place, giving rise to the formation of hollow carbon-MnO2 hybrid particles. An appropriate control in the diffusion of MnO4-
 into the core of hollow carbon spheres, nanocrystalline MnO2 can be successfully grown on both the external and internal surfaces of the hollow carbon structure. The carbon-MnO2 hybrid spheres are demonstrated as a promising candidate material for supercapacitor application.

Keywords: Hollow carbon spheres, Soft template, Manganese dioxide, Hybrid hollow spheres, Supercapacitor

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Journal of Power Sources 240 (2013) 713-720

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

Versi lain/terkait

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