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Li Conductivity of Nanocrystalline Li4Ti5O12 Prepared by a Sol-Gel Method and High-Energy Ball Milling
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SYSNO ASEP 0323376 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Li Conductivity of Nanocrystalline Li4Ti5O12 Prepared by a Sol-Gel Method and High-Energy Ball Milling Překlad názvu Li – iontová vodivost nanokrystalického Li4Ti5O12 připraveného metodou sol-gel a metodou dispergace v kulovém mlýnku s velkou energií mletí Tvůrce(i) Iwaniak, W. (DE)
Fritsche, J. (DE)
Zukalová, Markéta (UFCH-W) RID, SAI, ORCID
Winter, R. (GB)
Wilkening, M. (DE)
Heitjans, P. (DE)Zdroj.dok. Defect and Diffusion Forum - ISSN 1012-0386
289-292, - (2009), s. 565-570Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova battery materials ; lithium titanate ; impendance spectroscopy ; structural disorder Vědní obor RIV CG - Elektrochemie CEZ AV0Z40400503 - UFCH-W (2005-2011) DOI 10.4028/www.scientific.net/DDF.289-292.565 Anotace 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. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2009
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