Li conductivity of nanocrystalline Li4Ti5O12 prepared by a sol-gel method and high-energy ball milling

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dc.contributor.author Iwaniak, Wojciech
dc.contributor.author Fritzsche, J.
dc.contributor.author Zukalova, M.
dc.contributor.author Winter, Rudolf
dc.contributor.author Wilkening, Martin
dc.contributor.author Heitjans, Paul
dc.date.accessioned 2009-11-09T14:08:30Z
dc.date.available 2009-11-09T14:08:30Z
dc.date.issued 2009-04
dc.identifier.citation Iwaniak , W , Fritzsche , J , Zukalova , M , Winter , R , Wilkening , M & Heitjans , P 2009 , ' Li conductivity of nanocrystalline Li4Ti5O12 prepared by a sol-gel method and high-energy ball milling ' Defect and Diffusion Forum , vol 289-292 , pp. 565-570 . , 10.4028/www.scientific.net/DDF.289-292.565 en
dc.identifier.issn 1012-0386
dc.identifier.other PURE: 142082
dc.identifier.other dspace: 2160/3450
dc.identifier.uri http://hdl.handle.net/2160/3450
dc.description Iwaniak, W., Fritzsche, J., Zukalova,M., Winter, R., Wilkening,M., Heitjans. P. (2009). Li conductivity of nanocrystalline Li4Ti5O12 prepared by a sol-gel method and high-energy ball milling. Defect and Diffusion Forum, 289-292, pp. 565-570 Sponsorship: Deutsche Forschungsgemeinschaft, Czech Ministry of Education, Land Niedersachsen, Sud Chemie AG en
dc.description.abstract Spinel-type structured Li4+xTi5O12 (0 6 x 6 3 ) is actually one of the most promising anode materials for Li ion batteries. In its nanostructured form it is already used in some commercially available Li ion batteries. As was recently shown by our group (Wilkening et al., Phys. Chem. Chem. Phys. 9 (2007) 1239), Li diffusivity in microcrystalline Li4+xTi5O12 with x = 0 is rather slow. In the present contribution the Li conductivity in nanocrystalline samples of the electronic insulator Li4Ti5O12 prepared by different routes is investigated using impedance spectroscopy. The mean crystallite size of the samples is about 20 nm. The ionic conductivity of nanocrystalline Li4Ti5O12 obtained by mechanical treatment is higher by about two orders of magnitude compared to that found for a material which was prepared following a sol-gel method. The latter resembles the behaviour of the microcrystalline sample with an average particle size in the μm range rather than that of a nanocrystalline ball milled one with a mean crystallite size of about than 20 nm. The larger conductivity of the ball milled sample is ascribed to a much higher defect density generated when the particle size is reduced mechanically. en
dc.format.extent 6 en
dc.language.iso eng
dc.relation.ispartof Defect and Diffusion Forum en
dc.subject Battery Materials en
dc.subject Impedance Spectroscopy en
dc.subject Lithium Titanate en
dc.subject Structural Disorder en
dc.title Li conductivity of nanocrystalline Li4Ti5O12 prepared by a sol-gel method and high-energy ball milling en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.4028/www.scientific.net/DDF.289-292.565
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Materials Research en
dc.description.status Peer reviewed en


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