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The effects of surface modification on the supercapacitive behaviors of novel mesoporous carbon derived from rod-like hydroxyapatite template

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Abstract.
Novel mesoporous carbon has been synthesized using rod-like nano-hydroxyapatite (HA) particles as
templates, sucrose as carbon precursor by polymerizing, carbonizing and the removal of templates with
HCl solution. In the process, HA not only acted as an endotemplate but also an exotemplate producing
micropores and mesopores. Subsequently, mesoporous carbon was modified by HNO3 solution with different
concentration. The morphology, pore structure, and surface functional groups of the as-obtained
samples are analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM),
Brunauer–Emmett–Teller method (BET), X-ray diffraction (XRD), Fourier transform infrared spectroscopy
(FT-IR) and X-ray photoelectron spectroscopy (XPS). The electrochemical performance for electrochemical
capacitors is evaluated in a 1 M H2SO4 aqueous solution. The results manifest that the structrue of
resultant carbon with a high surface area (719.7 m2 g−1) and large pore volume (1.51 cm3 g−1) is the replica
of HA. After modification, the surface area and pore volume mesoporous carbons slightly decrease, while
their electrochemical performance have been significantly improved with the increase of the capacitance
from 125.7 to 170.1 F g−1 and a non-decayed cycle life over 5000 cycles for HA-C-0.15N.

Keywords:
Mesoporous carbon
Hydroxyapatite
Template
HNO3 solution
Electrical double-layer capacitors

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2013

Deskripsi Fisik

Electrochimica Acta 89 (2013) 400– 406

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

ELEKTRONIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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