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Interactive effects of pore size control and carbonization temperatures on supercapacitive behaviors of porous carbon/carbon nanotube composites

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Abstract.
Porous carbon-based electrodes were prepared by carbonization with poly(vinylidene fluoride) (PVDF)/
carbon nanotube (CNT) composites to further increase the specific capacitance for supercapacitors. The
specific capacitance, pore size distribution, and surface area of the PVDF/CNT composites were measured,
and the effect of the carbonization temperatures was examined. The electrochemical properties were
examined by cyclic voltammetry, impedance spectroscopy, and galvanostatic charge–discharge performance
using a two-electrode system in TEABF4 (tetraethylammonium tetrafluoroborate)/acetonitrile as
a non-aqueous electrolyte. The highest specific capacitance of ~101 F g-1 was obtained for the samples
carbonized at 600 oC. The pore size of the samples could be controlled to below 7 nm through the carbonization
process. This suggests that micropores make a significant contribution to the specific capacitance
due to improved charge transfer between the pores of the electrode materials and the electrolyte.

Keywords: Supercapacitors; Carbonization temperature; Non-aqueous electrolyte; C/C composites

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

New York : Elsevier Inc.., 2012

Deskripsi Fisik

Journal of Colloid and Interface Science 377 (2012) 307–312

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

377 (2012)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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