e-journal

Three dimensional few layer graphene and carbon nanotube foam architectures for high fidelity supercapacitors

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Abstract.
Supercapacitors are promising alternative energy storage systems due to their relatively fast
rate of energy storage and delivery. We describe a simple and scalable method to fabricate
three-dimensional (3D) few-layer graphene/multi-walled carbon nanotube (MWNT) hybrid
nanostructures on industrial grade metal foam foils (nickel foam) via a one-step ambient
pressure chemical vapor deposition (APCVD) process. The as-grown few-layer graphene/MWNT
nanocarbon foams are in the form of a homogeneous and densely packed hierarchical
nanostructures and possess a very large surface area of 743 m2 g-1. Symmetrical electrochemical
double-layer capacitors (EDLCs) of 3D hybrid hierarchical few-layer graphene/MWNT
nanostructures show a high specific capacitance of 286 F g-1 which leads to an energy density of
39.72 Wh kg1 and a superior power density of up to 154.67 kW kg1. Moreover, the capacitance
retention of 99.34% after 85000 charge–discharge cycles demonstrates the very high stability of
the electrode architectures for supercapacitors. These merits enable the innovative 3D
hierarchical few-layer graphene/MWNT foam to serve as high performance EDLC electrodes,
resulting in energy storage devices with very high stability and power density.

KEYWORDS: Graphene; Carbon nanotube; Foam; Supercapacitor; Chemical vapor deposition

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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, 294–303

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

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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