Show simple item record Iwaniak, Wojciech Fritzsche, J. Zukalova, M. Winter, Rudolf Wilkening, Martin Heitjans, Paul 2009-11-09T14:08:30Z 2009-11-09T14:08:30Z 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 . DOI: 10.4028/ en
dc.identifier.issn 1012-0386
dc.identifier.other PURE: 142082
dc.identifier.other PURE UUID: e6ed3434-84e7-4b26-93ab-6c4205139629
dc.identifier.other dspace: 2160/3450
dc.identifier.other RAD_Outputs_All_ID_Import_20121105.csv: row: 1083
dc.identifier.other Scopus: 75349087464
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.rights 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 /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution Department of Physics en
dc.contributor.institution Materials Research en
dc.description.status Peer reviewed en

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