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A hybrid of MnO2 nanowires and MWCNTs as cathode of excellent rate capability for supercapacitors

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Abstract.
A hybrid of MnO2-nanowires and MWCNTs to be used as cathode in a supercapacitor with good electrochemical
performance was prepared by a facile hydrothermal method. In this hybrid the α-MnO2 nanowires are well entangled with MWCNTs. The MWCNTs provide a network for fast electron transport whereas MnO2 nanowires show a fast redox response. Since gain/loss of both electrons and ions can be realized very rapidly at the same time, the hybrid has an excellent rate capability and delivers an energy density of 17.8 Wh kg−1 at 400 W kg−1, which is maintained almost constant even at 3340 W kg−1 in 0.5 M Li2SO4 aqueous electrolyte. The cycling behavior is very good even in the presence of oxygen. The data present great promise for the hybrid as a practical cathode material for aqueous supercapacitor.

Keywords: Aqueous supercapacitor, Hybrid, MnO2, Nanowires, MWCNTs, Rate capability

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2012

Deskripsi Fisik

Journal of Power Sources 197 (2012) 330– 333

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 MATERIAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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