Ko YW

Pramana SS

Sharma Y

Srinivasan M

Teh PF

ZnMn&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;4&lt;/inf&gt; structures of various morphologies (nanorods, nanofibers, nanowebs) have been prepared via a facile electrospinning technique by a simple variation of the sintering profile, and have subsequently been employed as anodes in lithium ion battery applications. After the sintering process, as-spun nanofibers with high aspect ratio have broken into short segments of ZnMn&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;4&lt;/inf&gt; nanorods (ZMO-NR). Incorporating an intermediate carbonization step has strengthened the mechanical integrity of as-spun nanofibers, resulting in the formation of sintered nanofibers (ZMO-NF) and nanowebs (ZMO-NW). On the basis of FESEM, HRTEM and XRD studies, the formation mechanism of nanostructures consisting of hierarchically self-assembled ZnMn&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;4&lt;/inf&gt; nanocrystals is discussed. Particle size distribution is computed by Rietveld refinement and HRTEM micrographs, while the valence states are confirmed by XPS. The initial discharge of ZMO-NF and ZMO-NW demonstrated a high capacity of ∼1469 mA h g&lt;sup&gt;-1&lt;/sup&gt; and 1526 mA h g&lt;sup&gt;-1&lt;/sup&gt;, respectively, in the voltage ranges of 0.005 V and 3.0 V versus Li/Li&lt;sup&gt;+&lt;/sup&gt; at 60 mA g&lt;sup&gt;-1&lt;/sup&gt;, associated with reversible capacities of ∼705 mA h g&lt;sup&gt;-1&lt;/sup&gt; and 530 mA h g&lt;sup&gt;-1&lt;/sup&gt; after 50 cycles. Morphology tuning of anodes and the importance of interconnected nanoparticulate pathways for lithium ion diffusion are elucidated. \ua9 2013 The Royal Society of Chemistry

Tuning the morphology of ZnMn<sub>2</sub>O<sub>4 </sub>lithium ion battery anodes by electrospinning and its effect on electrochemical performance

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