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Wide-temperature range operation supercapacitors from nanostructured activated carbon fabric

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a b s t r a c t
Electrochemical power sources that offer high energy and power densities and, can also withstand a
harsh temperature range have become extremely desirable in applications ranging from civilian portable
electronic devices to militaryweapons. In this report,we demonstrated a wide temperature withstanding
supercapacitor which can be operated from 100 ◦C to −40 ◦C within a voltage window from −2V to 2V.
The performance of the supercapacitor coin cells, assembled with nanostructured activated carbon fabric
(ACF) as the electrode material and 1Mtetraethylammoniumtetrafluoroborate (TEABF4) in polypropylene
carbonate (PC) solution as the electrolyte,was systematically studied within the set temperature window.
The ACF supercapacitor yielded ideal rectangular shapes in cyclic voltammograms within 0–100 ◦C with
an average mass capacitance of 90 F g−1 and, 60 F g−1 at −25 ◦C. The capacitance was still over 20 F g−1 at the extremely low temperature of −40 ◦C. Another exciting feature of the ACF supercapacitors was that
they resumed their room temperature capacitance when cooled from 100 ◦C and defrosted from −40 ◦C,
demonstrating an excellent repeatability and stability. The charge–discharge behavior of the ACF supercapacitors showed long-cycle stability at extreme temperatures. These high electrochemical performances make this type of supercapacitors very promising in many practical applications.
Keywords: Supercapacitor, Activated carbon fabric, Organic electrolyte, Temperature effect

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

: Journal of Power Sources 193 (2009) 944–949., 2009

Deskripsi Fisik

Journal of Power Sources 193 (2009) 944–949

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

KIMIA KARBON

Info Detail Spesifik

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Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

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