e-journal

Long-term cycling of carbon-based supercapacitors in aqueous media

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a b s t r a c t
The behaviour of mesophase-derived electrodes on long-duration cycling conditions was studied in 1M
sulfuric acid and 6M potassium hydroxide. Variation in the specific capacitance values with the number
of cycles shows a good cycling life performance in acidic media but very poor in an alkaline electrolyte.
The total loss of capacitance after 7000 cycles in acidic media is 8% at 0.6V and 16% at 1 V, whereas in the basic electrolyte the reduction in the capacitance values is 72%, even at a very small operating voltage (0.6 V). This behaviour was associated to the strong oxidation of the positive electrode caused by the progressive shift of the working potential towards very positive potential values during cycling.
Keywords: Activated carbon, Electrochemical capacitor, Double layer, Pseudocapacitance, Long-term cycling

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

: Elsevier Ltd. All rights reserved., 2009

Deskripsi Fisik

Electrochimica Acta 54 (2009) 4481–4486

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

Info Detail Spesifik

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Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

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