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Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries

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Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries

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dc.contributor.author Cheah, Yan Ling
dc.contributor.author Gupta, Nutan
dc.contributor.author Pramana, Stevin S.
dc.contributor.author Aravindan, Vanchiappan
dc.contributor.author Wee, Grace
dc.contributor.author Srinivasan, Madhavi
dc.date.accessioned 2011-09-08T08:51:14Z
dc.date.available 2011-09-08T08:51:14Z
dc.date.copyright 2011
dc.date.issued 2011-09-08
dc.identifier.citation Cheah, Y. L., Gupta, N., Pramana, S. S., Aravindan, V., Wee, G., & Srinivasan, M. (2011). Morphology, Structure and Electrochemical Properties of Single Phase Electrospun Vanadium Pentoxide Nanofibers for Lithium Ion Batteries. Journal of Power Sources, 196, 6465-6472.
dc.identifier.issn 0378-7753
dc.identifier.uri http://hdl.handle.net/10220/7028
dc.description.abstract One-dimensional (1D) vanadium pentoxide (V2O5) nanofibers (VNF) are synthesized by electrospinning vanadium sol–gel precursors containing vanadyl acetylacetonate and poly(vinylpyrrolidone) followed by sintering. Crystal structure, molecular structure and morphology of electrospun VNF are analyzed using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area diffraction (SAED), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Single-phase electrospun VNF not, vert, similar300–800 nm in diameter, 20–50 μm long (aspect ratio > 50) with porous interconnected fibrous morphology are revealed by FESEM and TEM analysis. Electrochemical properties of the sintered VNF, as a cathode in lithium-ion batteries, explored using cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) give rise to new understandings of the electrochemical processes occurring in these nanofibrous cathodes. Electrospun VNF exhibits initial discharge capacity not, vert, similar316 mAh g−1 (not, vert, similar2.2 Li per V2O5) in the voltage range of 1.75 and 4.0 V vs. Li/Li+ at 0.1 C rate. When cycled at a reduced voltage range of 2.0–4.0 V vs. Li/Li+, less phase transitions occur, giving rise to the initial specific capacity of 308 mAh g−1 and improved cyclic retention of 74% after 50 cycles.
dc.format.extent 8 p.
dc.language.iso en
dc.relation.ispartofseries Journal of power sources
dc.rights © 2011 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Power Sources, Elsevier.  It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document.  The published version is available at: http://dx.doi.org/10.1016/j.jpowsour.2011.03.039.
dc.subject DRNTU::Engineering::Materials
dc.title Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1016/j.jpowsour.2011.03.039
dc.description.version Accepted version
dc.identifier.rims 158358

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