A sonochemical approach for the synthesis of thermally stable mesoporous microspheres of TiO2 for use as high performance anodes for Li-ion batteries

Sunkara, Satyendar and Munichandraiah, N and Varma, KBR and Shivashankar, SA (2016) A sonochemical approach for the synthesis of thermally stable mesoporous microspheres of TiO2 for use as high performance anodes for Li-ion batteries. In: NEW JOURNAL OF CHEMISTRY, 40 (8). pp. 7197-7203.

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Abstract

A facile, surfactant-free sonochemical synthesis route at a relatively low temperature was employed to prepare mesoporous microspheres of anatase titanium dioxide (TiO2), using the heteroleptic (mixed-ligand) complex, bis-isopropoxy-bis-tertiarybutylacetoacetatotitanium, Ti((OPr)-Pr-i)(2)(tbaoac)(2)], as the precursor. The transformation of the as-prepared material into crystalline TiO2 was achieved by heating in air at 500 degrees C. Interestingly, the material retained its pure anatase phase even after heating at 800 degrees C. The as-prepared sample and the heated ones were characterized by powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), and electron microscopy (SEM, TEM) which, together, revealed that the spheres are mesoporous and, significantly, hollow. As an anode material in a Li-ion battery, the titania microspheres exhibited a high reversible capacity of 212 mA h g(-1) after 100 charge and discharge cycles and displayed excellent cycling stability.

Item Type:	Journal Article
Publication:	NEW JOURNAL OF CHEMISTRY
Additional Information:	Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	22 Oct 2016 07:31
Last Modified:	22 Oct 2016 07:31
URI:	http://eprints.iisc.ac.in/id/eprint/54948

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