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|Title:||Functional properties of electrospun NiO/RuO 2 composite carbon nanofibers||Authors:||Wu, Y.
|Issue Date:||15-Mar-2012||Citation:||Wu, Y., Balakrishna, R., Reddy, M.V., Nair, A.S., Chowdari, B.V.R., Ramakrishna, S. (2012-03-15). Functional properties of electrospun NiO/RuO 2 composite carbon nanofibers. Journal of Alloys and Compounds 517 : 69-74. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jallcom.2011.12.019||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.||Source Title:||Journal of Alloys and Compounds||URI:||http://scholarbank.nus.edu.sg/handle/10635/85232||ISSN:||09258388||DOI:||10.1016/j.jallcom.2011.12.019|
|Appears in Collections:||Staff Publications|
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