e-journal

Hydrothermal synthesis of macroscopic nitrogen-doped graphene hydrogels for ultrafast supercapacitor

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Abstract.
Nitrogen-doped graphene has been a recent research focus. It is crucial to further utilize the
excellent properties of graphene macroscopic assemblies. Herein, we first report a unique and
convenient hydrothermal process for controlled synthesis and structural adjustment of the
nitrogen-doped graphene hydrogel (GN-GH), which can be readily scaled-up for mass production
of nitrogen-doped graphene hydrogel by using organic amine and graphene oxide as
precursors. The organic amine is not only as nitrogen sources to obtain the nitrogen-doped
graphene but also as an important modification to control the assembly of graphene sheets in
the 3D structures. Inner structure of the GN-GHs and the content of nitrogen in the graphene
are easily adjusted by organic amine. Interestingly, it has been found that the supercapacitor
performance of the typical product could be remarkably enhanced. Even at an ultrafast charge/
discharge rate of 185.0 A/g, a high power density of 205.0 kW/kg can be obtained. In addition,
at a current density of 100.0 A/g, 95.2% of its capacitance was retained for 4000 cycles. The
present nitrogen-doped graphene hydrogels may have potential applications as ultrahigh power
density capacitors in the vehicle, lift and the other devices at high rates.

KEYWORDS: Nitrogen-doped; graphene; Hydrothermal; Hydrogel; Structural adjustment; Ultrafast; Supercapacitor

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Informasi Detail

Judul Seri

Nano Energy

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2013

Deskripsi Fisik

Nano Energy (2013) 2, 249–256

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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