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Lookup NU author(s): Dr Stevin Pramana
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© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Single-phase Na<inf>1.2</inf>V<inf>3</inf>O<inf>8</inf> materials with single and hierarchical nanobelt morphologies were prepared by using a versatile electrospinning technique by altering the sintering profiles. On the basis of characterization by field-emission scanning electron microscopy and high-resolution transmission electron microscopy, the formation mechanisms of products with tunable morphologies are discussed. The products obtained are employed as cathode materials for lithium-ion batteries. Their electrochemical activities are demonstrated through galvanostatic cycling and cyclic voltammetry. The non-agglomerated, single nanobelts with exposed (100) facets, which serve as channels for facile lithium diffusion, are capable of exhibiting higher maximum capacities of approximately 218 mAhg<sup>-1</sup> compared to hierarchical nanobelts with a maximum capacity of approximately 197 mAhg<sup>-1</sup> versus Li/Li<sup>+</sup> at a current density of 200 mAg<sup>-1</sup>. Their associated reversible capacities are approximately 207 and 173 mAhg<sup>-1</sup>, respectively, after 100 cycles. Single nanobelts with individual belt-like structures and preferred facet orientation also exhibit better rate capabilities.
Author(s): Ko YW, Teh PF, Pramana SS, Wong CL, Su T, Li L, Madhavi S
Publication type: Article
Publication status: Published
Print publication date: 10/06/2015
Online publication date: 11/03/2015
Acceptance date: 09/02/2015
ISSN (electronic): 2196-0216
Publisher: Wiley-VCH Verlag
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