NDLI: Lithium conductivity and lithium diffusion in NASICON-type Li$_{1+x}$Ti$_{2–x}$Al$_{x}$(PO$_{4}$)$_{3}$ (x= 0; 0.3) prepared by mechanical activation

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Ionics : Volume 14, Issue 3, June 2008

Ionics : Volume 14, Issue 2, April 2008

Ionics : Volume 14, Issue 1, February 2008

Lithium conductivity and lithium diffusion in NASICON-type Li$_{1+x}$Ti$_{2–x}$Al$_{x}$(PO$_{4}$)$_{3}$ (x= 0; 0.3) prepared by mechanical activation

Content Provider	Springer Nature Link
Author	Kosova, N. V. Devyatkina, E. T. Stepav, A. P. Buzlukov, A. L.
Copyright Year	2007
Abstract	LiTi$_{2}$(PO$_{4}$)$_{3}$ (LTP) and Li$_{1.3}$Al$_{0.3}$Ti$_{1.7}$(PO$_{4}$)$_{3}$ (LATP) (S. g. R-3c) have been prepared using conventional ceramic and mechanical activation (MA) methods. It has been shown that preliminary mechanical activation of initial mixtures leads to different nature and amount of dielectric admixtures in the final product after heat treatment at 800–1000 °C as compared with ceramic method. Transport properties of as prepared materials have been studied by lithium ionic conductivity at d.c. and a.c. (complex impedance method), and $^{7}$Li NMR spin-lattice relaxation rate T$_{1}$ $^{–1}$ measurements. Lithium ionic conductivity of mechanochemically prepared LTP and LATP was characterized by significant reduction of grain boundary resistance, especially for LTP, while the bulk conductivity and Li ion diffusion does not noticeably change. The activation energy of bulk conductivity and Li ion diffusion, i.e. short-range motion, appeared to be almost the same for all samples and was equal to ~0.20 eV. On contrary, the activation energy of d.c.-conductivity, i.e. long-range Li ion motion decreases from ~0.6 eV for ceramic samples to ~0.4 eV for samples prepared via mechanochemical route. It was proposed that MA leads to formation of nano-particulate high-conductive grain boundaries both in LTP and LATP.
Starting Page	303
Ending Page	311
Page Count	9
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	14
Issue Number	4
e-ISSN	18620760
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-01-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Conductors, Materials preparations, Ionic conductivities, Diffusion Condensed Matter Optical and Electronic Materials Renewable Energy Sources Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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