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Nitrogen-doped graphene hollow nanospheres as novel electrode materials for supercapacitor applications

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Abstract.
Nitrogen-doped graphene hollow spheres (NGHS) have been prepared by a simple layer-by-layer assembly
of graphene oxide (GO) and polyaniline (PANI) on polystyrene (PS) nanospheres, followed by
calcination to remove the PS template and realize the carbonization of PANI. The resultant NGHS has a
high nitrogen content of 8.7 atom%, in which various nitrogen species, such as pyridinic-N, pyrrolic-N,
and quaternary-N, are detected. The hollow nanostructure of NGHS can provide high electroactive regions,
while the effective nitrogen-doping of graphene can increase electron mobility and space charge
capacitance. The specific capacitance of NGHS with four bilayers (NGHS-4bi) can reach 381 F g-1 at a
current density of 1 A g-1. The greatly enhanced electrochemical performance can be ascribed to the
synergistic effect of the hollow nanostructure and nitrogen-doping, suggesting that NGHS as novel
electrode materials may have potential applications in high performance energy storage devices.

Keywords: Nitrogen-doping, Graphene, Hollow nanostructure, 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 243 (2013) 973-981

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

Versi lain/terkait

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