Synthesis and electrochemical characterisation of electrospun lithium titanate ultrafine fibres

The phase pure spinel lithium titanate ([Li.sub.4][Ti.sub.5][O.sub.12]) in the form of ultrafine fibre was synthesised by the combination of sol-gel and electrospinning techniques. The electrospinning process for the preparation of [Li.sub.4][Ti.sub.5][O.sub.12] precursor was optimised to get bead-f...

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Bibliographic Details
Published in:Journal of materials science 2013-09, Vol.48 (17), p.5827
Main Authors: Sandhya, C.P, John, Bibin, Gouri, C
Format: Article
Language:English
Subjects:
Chemical properties
Diffraction
Spinel group
X-rays
Online Access:Get full text
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Summary:The phase pure spinel lithium titanate ([Li.sub.4][Ti.sub.5][O.sub.12]) in the form of ultrafine fibre was synthesised by the combination of sol-gel and electrospinning techniques. The electrospinning process for the preparation of [Li.sub.4][Ti.sub.5][O.sub.12] precursor was optimised to get bead-free fibrous mat with uniform thickness. Crystalline [Li.sub.4][Ti.sub.5][O.sub.12] in the form of ultrafine fibre was synthesised by the calcination of the precursor at 800°C in air for 4 h. The material was characterised by X-ray diffraction, Raman spectroscopy and scanning electron microscopy and subsequently evaluated as an electrode active material using Li metal as a counter electrode. The material exhibited a first cycle specific capacity of 154 mAh [g.sup.-1] with good rate capability and cyclability.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-O13-7375-9