Publication Type:

Journal Article

Source:

Journal of Alloys and Compounds, Volume 517, p.69-74 (2012)

URL:

http://www.scopus.com/inward/record.url?eid=2-s2.0-84856224249&partnerID=40&md5=3d7d8bb4cca252d54edbec5d05de251c

Keywords:

1D nanostructures, Activated carbon, Anodes, Brunauer-emmett-teller surface areas, Capacitors, Carbon carbon composites, Carbon composites, Composite samples, Current rate, Cyclic voltammetry, Electrochemical impedance, Electrospinning, Electrospuns, Enamels, Field emission scanning electron microscopy, Functional properties, Galvanostatics, Homogenous mixtures, Hybrid supercapacitors, Lithium, Lithium batteries, Nanofibers, Nickel compounds, Nickel oxide, NiRu-CNF, Powder X ray diffraction, Reversible capacity, Rietveld refinement, ruthenium, Ruthenium compounds, Salt precursors, scanning electron microscopy, Super capacitor, Voltage ranges, X ray diffraction

Abstract:

One-dimensional (1D) nickel oxide/ruthenium oxide (NiO/RuO 2)-carbon composite nanofibers (NiRu-C-NFs) were fabricated via electrospinning of a homogenous mixture of polyacrylonitrile (PAN) and Ni/Ru salt precursors at different ratios followed by heat treatments. The 1D nanostructures of the composite material were characterized by field-emission scanning electron microscopy (FE-SEM), powder X-ray diffraction (XRD), Rietveld refinement and Brunauer-Emmett-Teller (BET) surface area measurements. Li-cycling properties were evaluated using cyclic voltammetry and galvanostatic properties. The asymmetric hybrid supercapacitor studies were carried out with activated carbon as a cathode and NiRu-C-NFs composites as anodes in the cycling range, 0.005-3.0 V using 1 M LiPF 6 (EC;DMC) electrolyte. NiRu-C-NFs fabricated from 5 wt% nickel (II) and 15 wt% ruthenium (III) precursors showed a capacitance up to ∼60 F g -1 after 30 cycles. Anodic Li-cycling studies of NiRu-C-NF-0 and NiRu-C-NF-2 composite samples showed a reversible capacity of 230 and 350 m Ahg -1 at current rate of 72 mA g -1 at the end of 40th cycle in the voltage range of 0.005-3.0 V. Electrochemical impedance studies (EIS) on NiRu-C-NFs showed lower impedance value for 15 wt% Ru than the bare sample. © 2011 Elsevier B.V.

Notes:

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Cite this Research Publication

Y. Wu, Balakrishna, R., Reddy, M. V., Nair, A. S., Chowdari, B. V. R., and Ramakrishna, S., “Functional properties of electrospun NiO/RuO 2 composite carbon nanofibers”, Journal of Alloys and Compounds, vol. 517, pp. 69-74, 2012.