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Lithium Storage in Nanostructured TiO2 Made by Hydrothermal Growth
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SYSNO ASEP 0101020 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Lithium Storage in Nanostructured TiO2 Made by Hydrothermal Growth Title Ukládáni lithia v TiO2 nanostrukturách, připravených hydrotermálním růstem Author(s) Kavan, Ladislav (UFCH-W) RID, ORCID
Kalbáč, Martin (UFCH-W) RID, ORCID
Zukalová, Markéta (UFCH-W) RID, SAI, ORCID
Exnar, I. (CH)
Lorenzen, V. (DE)
Nesper, R. (CH)
Grätzel, M. (CH)Source Title Chemistry of Materials. - : American Chemical Society - ISSN 0897-4756
Roč. 16, - (2004), s. 477-485Number of pages 9 s. Language eng - English Country US - United States Keywords lithium ; nanostructured TiO2 ; Li insertion Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/03/0824 GA ČR - Czech Science Foundation (CSF) 1P04OCD14.10 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z4040901 - UFCH-W Annotation Nanostructured titania materials were prepared from TiCl4 via autoclaving in 10 M NaOH at 250oC 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). Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2006
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