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Improved elevated temperature performance of Al-intercalated V2O5 electrospun nanofibers for lithium-ion batteries

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Improved elevated temperature performance of Al-intercalated V2O5 electrospun nanofibers for lithium-ion batteries

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Title: Improved elevated temperature performance of Al-intercalated V2O5 electrospun nanofibers for lithium-ion batteries
Author: Cheah, Yan Ling; Aravindan, Vanchiappan; Madhavi, Srinivasan
Copyright year: 2012
Abstract: Al-inserted vanadium pentoxide (V2O5) nanofibers (Al-VNF) are synthesized by simple electrospinning technique. Powder X-ray diffraction (XRD) patterns confirm the formation of phase-pure structure. Elemental mapping and XPS studies are used to confirm chemical insertion of Al in VNF. Surface morphological features of as-spun and sintered fibers with Al-insertion are investigated by field emission scanning electron microscopy (FE-SEM). Electrochemical Li-insertion behavior of Al-VNFs are explored as cathode in half-cell configuration (vs. Li) using cyclic voltammetry and galvanostatic charge-discharge studies. Al-VNF (Al0.5V2O5) shows an initial discharge capacity of ~250 mAh g–1 and improved capacity retention of >60% after 50 cycles at 0.1 C rate, whereas native VNF showed only ~40% capacity retention at room temperature. Enhanced high current rate and elevated temperature performance of Al-VNF (Al1.0V2O5) is observed with improved capacity retention (~70%) characteristics. Improved performance of Al-inserted VNF is mainly attributed to the retention of fibrous morphology, apart from structural stabilization during electrochemical cycling.
Subject: DRNTU::Engineering::Materials
Type: Journal Article
Series/ Journal Title: ACS applied materials & interfaces
School: School of Materials Science and Engineering
Research Centre: TUM-CREATE Center for ElectromobilityEnergy Research Institute @ NTU (ERI@N)
Rights: © 2012 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Applied Materials & Interfaces , American Chemical Society. 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: [DOI: http://dx.doi.org/10.1021/am300616k]
Version: Accepted version

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