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Title: Preparation and characterization of NASICON type Li + ionic conductors
Authors: Rao, R.P. 
Maohua, C.
Adams, S. 
Keywords: Bond valence
Ion transport
Lithium ion conduction
Temperature dependent X-ray
Issue Date: Oct-2012
Citation: Rao, R.P., Maohua, C., Adams, S. (2012-10). Preparation and characterization of NASICON type Li + ionic conductors. Journal of Solid State Electrochemistry 16 (10) : 3349-3354. ScholarBank@NUS Repository.
Abstract: The new scandium/aluminium co-doped NASICON phases Li1 +xAl ySc x-yTi 2-x(PO 4) 3 (x=0.3, y=0,0.1,0.2,0.3) were prepared by mechanical milling followed by annealing of the mixtures at 950 °C. X-ray diffraction of all samples showed the formation of NASICON structure with space group R-3c along with a minor impurity. Rietveld refinement of the X-ray data was performed to identify the structural variation. Doping with Sc 3+ caused elongation of a- and c- axes for all the compounds when compared with undoped LiTi 2(PO 4) 3. The compound Li 1.3Sc 0.3Ti 1.7(PO 4) 3 showed a maximum of a08.5504(7), c020.986(3) Å at room temperature and exhibited highest coefficient of thermal expansion. The highest ionic conductivity (σ), 7.28 × 10 -4 S cm -1 was observed for Li 1.3Sc 0.3Ti 1.7(PO 4) 3, two orders of magnitude higher than for the undoped phase. © Springer-Verlag 2012.
Source Title: Journal of Solid State Electrochemistry
ISSN: 14328488
DOI: 10.1007/s10008-012-1780-x
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