High performance hybrid supercapacitor based on two nanostructured conducting polymers: Self-doped polyaniline and polypyrrole nanofibers

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High performance hybrid supercapacitor based on two nanostructured conducting polymers: Self-doped polyaniline and polypyrrole nanofibers

H.R. Ghenaatian - Nama Orang; M.F. Mousavi - Nama Orang; M.S. Rahmanifar - Nama Orang;

Abstract.
A hybrid asymmetric electrochemical supercapacitor is constructed by employing two different nanostructured
conducting polymers of polypyrrole (PPy) and self-doped polyaniline (SDPA). Different electrochemical methods, including cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS), are performed to characterize the electrochemical performance of the supercapacitor. The maximal working potential window of 1.3 V is associated with more than 97 F g−1 of total electrode materials. The cell maintains approximately 70% of its initial capacitance after 1000 cycles with an equivalent series resistance (ESR) below 1.6 Ωcm2. Furthermore, the system shows high specific energy, specific power and maximum power values of 22.87 Wh kg−1, 570 W kg−1 and 45,193 W kg−1, respectively, at a current density of 5 mA cm−2 in 1 M KCl. Long-life cycling is achieved by removing dissolved oxygen and using a mild pH electrolyte, which limits the redox activity of the electrically conducting polymers (ECPs). Moreover, the proposed supercapacitor exhibits high capacitance retention of 89% at a higher current density (40 mA cm−2), indicating good electrochemical stability and rate capability. The performance of the proposed hybrid supercapacitor has been compared with two other symmetric cells.

Keywords: Hybrid supercapacitor, Self-doped polyaniline nanofiber, Polypyrrole nanofiber

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Informasi Detail

Judul Seri: Electrochimica Acta
No. Panggil: -
Penerbit: New York : Elsevier Ltd.., 2012
Deskripsi Fisik: Electrochimica Acta 78 (2012) 212– 222
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: FISIKA MATERIAL
Info Detail Spesifik: -
Pernyataan Tanggungjawab: agus

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High performance hybrid supercapacitor based on two nanostructured conducting polymers: Self-doped polyaniline and polypyrrole nanofibers

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