Lithium Storage in Nanostructured TiO2 Made by Hydrothermal Growth

By Ladislav Kavan, M. Kalbáč, M. Zukalová, I. Exnar, V. Lorenzen, R. Nesper, M. Graetzel. 2004

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Nanostructured titania materials were prepared from TiCl4 via autoclaving in 10 M NaOH at 250 °C and subsequent treatment in aqueous and/or acidic media. XRD and Raman spectroscopy evidenced the presence of anatase as the main phase, but most materials contained also some XRD-silent component. Cyclic voltammograms of lithium insertion demonstrate two pairs of reversible pseudocapacitive peaks (S-peaks) in addition to the ordinary peaks of diffusion-controlled Li insertion into the anatase lattice. The occurrence of S-peaks is associated with the nanosheet- and/or nanotubular morphology of the materials. This structure developed at hydrothermal conditions via exfoliation of the layered Na+/H+ titanate precursors. The S-peaks were suggested to be the signatures of quantum-size confinement in titania nanosheets. The nanosheet-containing materials are reducible by n-butyllithium to cubic LiTiO2 (at conditions when the ordinary nanocrystalline anatase gives only the orthorhombic Li0.5TiO2). Consequently, the e...

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/b9aee7f99ae98f952750b95ac4b45684da305a67