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Electrospun α-Fe2O3 nanostructures for supercapacitor applications

Publication Type : Journal Article

Thematic Areas : Nanosciences and Molecular Medicine

Publisher : Journal of Materials Chemistry A

Source : Journal of Materials Chemistry A, Volume 1, Number 38, p.11698-11704 (2013)

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Keywords : Capacitors, Crystalline nanostructure, Deposition, electrochemical analysis, Electrochemical characterizations, Electrochemical electrodes, Electrophoresis, Electrophoretic depositions, Electrospinning techniques, Energy dispersive X ray spectroscopy, Nanostructures, Polymers, Polyvinyl acetates, Powder X ray diffraction, scanning electron microscopy, Sintering, Supercapacitor application, transmission electron microscopy, X ray diffraction, X ray spectroscopy

Campus : Kochi

School : Center for Nanosciences, School for Sustainable Futures

Center : Nanosciences

Department : Nanosciences and Molecular Medicine

Year : 2013

Abstract : Herein, we report the facile synthesis of two α-Fe2O 3 nanostructures with different morphologies via an electrospinning technique using ferric acetyl acetonate as a precursor and polyvinyl acetate and polyvinyl pyrrolidone as the respective polymers. The as-electrospun metal oxide-polymer composite fibers were sintered at 500 °C to obtain two distinct nanostructures, denoted as nanograins and porous fibers throughout this manuscript. These crystalline nanostructures were characterized using powder X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX) and transmission electron microscopy (TEM). The characterization results elucidated the predominance of hematite (α-Fe2O3) with particle sizes of 21 and 53 nm, for the respective nanostructures. Electrophoretic deposition was carried out in order to fabricate thin film electrodes, which were then subjected to electrochemical analysis. Electrochemical characterization revealed that both of the fabricated electrodes exhibited excellent performance in 1 M LiOH electrolyte with specific capacitance values of 256 and 102 F g-1 for the porous fiber and nanograin structures, respectively, at a scan rate of 1 mV s-1 and excellent capacitance retention, even after 3000 cycles, thus making them promising electrode materials for energy storage devices. © 2013 The Royal Society of Chemistry.

Cite this Research Publication : G. Binitha, Soumya, M. S., Madhavan, A. A., Praveen, P., Balakrishnan, A., Subramanian, K. R. V., M.V. Ramana Reddy, Nair, S. V., A. S. Nair, and Sivakumar, N., “Electrospun α-Fe2O3 nanostructures for supercapacitor applications”, Journal of Materials Chemistry A, vol. 1, pp. 11698-11704, 2013.

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