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Integrating carbon nanotube into activated carbon matrix for improving the performance of supercapacitor

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Abstract.
A method of in situ integrating carbon nanotubes (CNTs) into activated carbon (AC) matrix was developed
to improve the performance of AC as a supercapacitor electrode. Glucose solution containing
pre-dispersed CNTs was hydrothermally carbonized to be a char-like intermediate product, and finally
converted into a “tube-in-AC” structure by the chemical activation using KOH. The “tube-in-AC” composite
had oxygen content of 12.98 wt%, specific surface area of 1626m2/g and 90% of 1–2nm micropores.
It exhibited capacitance of 378 F/g in the aqueous KOH electrolyte and excellent cyclibility under high
current, that is, the capacitance only decreased 4.6% after 2000 cycles at scanning rate of 100 mV/s. These
performances of “tube-in-AC” electrode are better than those of commercial AC electrodes, post-mixed
with CNTs or carbon black.

Keywords:
Supercapacitor
Carbon nanotubes
Activated carbon
Hydrothermal carbonization
Stability

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Informasi Detail

Judul Seri

Materials Science and Engineering

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2012

Deskripsi Fisik

Materials Science and Engineering B 177 (2012) 1138–1143

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

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