Lookup NU author(s): Dr Stevin Pramana
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Nanowebs consisting of interwoven ZnFe<inf>2</inf>O<inf>4</inf> nanofibers are synthesized by a simple electrospinning technique, to be employed as an environmentally friendly anode in lithium ion batteries. Effect of precursor viscosity on the growth mechanism of electrospun ZnFe<inf>2</inf>O<inf>4</inf> nanofibers (ZFO-NF) and ZnFe<inf>2</inf>O<inf>4</inf> nanorods (ZFO-NR) is studied by microscopy and diffraction techniques. Structural characterization by powder X-ray diffraction, FESEM and HRTEM studies evaluates the single phase nature of ZnFe<inf>2</inf>O<inf>4</inf>, which consists of 11(3) nm nanocrystals that self-agglomerate to form nanofibers after thermal treatment. FESEM micrographs depict the self-assembly of electrospun ZnFe<inf>2</inf>O <inf>4</inf> nanofibers into intertwined porous nanowebs with a continuous framework. Benefitting from the one-dimensional functional nanostructured architecture, the application of electrospun nanowebs with ZnFe <inf>2</inf>O<inf>4</inf> nanofiber (ZFO-NF) anodes in lithium ion batteries exhibits excellent cyclability and retains a reversible capacity of 733(10) mAh g<sup>-1</sup> up to 30 cycles at 60 mA g<sup>-1</sup> as compared to ZnFe <inf>2</inf>O<inf>4</inf> nanorods (ZFO-NR) with a capacity of ∼200 mAh g<sup>-1</sup>. In addition, the importance of providing electronic wiring during lithiation/delithiation, especially in prolonged cycling, is emphasized. © The Royal Society of Chemistry.
Author(s): Teh PF, Sharma Y, Pramana SS, Srinivasan M
Publication type: Article
Publication status: Published
Journal: Journal of Materials Chemistry
Print publication date: 14/10/2011
Online publication date: 22/08/2011
ISSN (print): 0959-9428
ISSN (electronic): 1364-5501
Publisher: Royal Society of Chemistry
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