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Title: Functional properties of electrospun NiO/RuO 2 composite carbon nanofibers
Authors: Wu, Y.
Balakrishna, R.
Reddy, M.V. 
Nair, A.S. 
Chowdari, B.V.R. 
Ramakrishna, S. 
Keywords: Anode
Lithium batteries
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.
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
ISSN: 09258388
DOI: 10.1016/j.jallcom.2011.12.019
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