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Electrochemical capacitive behaviors of ordered mesoporous carbons with controllable pore sizes

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Abstract.
Ordered mesoporous carbons (OMCs) with controllable pore sizes in the range of 4–10 nm are prepared
by a template procedure using 2D hexagonal MSU-H and 3D cubic KIT-6 as hard templates and
boric acid as the pore expanding agent. The electrochemical performances of the as-synthesized OMCs
as electrode materials for electrochemical double layer capacitors (EDLCs) are characterized by cyclic
voltammetry (CV), galvanostatic charge/discharge (GC) and electrochemical impedance spectroscopy
(EIS) experiments in 30 wt% KOH electrolyte. The influence of the pore size distributions of OMCs on
the electrochemical capacitive performances is discussed. The prepared OMCs exhibit good capacitive
behaviors with the specific capacitance values ranging from 143 to 205.3 F g−1 at a voltage scan rate
of 5 mV s−1 and 81 to 86% retained at a high scan rate of 100 mV s−1. OMC-M-2 shows the highest
specific surface capacitance value of 27.5 μF cm−2 at 5 mV s−1 with a peak pore size of 7.8 nm and a
Brunauer–Emmet–Teller (BET) surface area of 729.3 m2 g−1. The analysis of two kinds of pore symmetries
of OMCs with the same pore size of about 6.5 nm shows that the 3D cubic OMC exhibited superior
capacitive performance than the 2D hexagonal OMC.

Keywords: Electrochemical double layer capacitors; Ordered mesoporous carbons; Pore size control; Template synthesis

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Ketersediaan

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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 209 (2012) 243– 250

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

209 (2012)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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