A systematic study of Nasicon-type Li sub(1 + x)M sub(x)Ti sub(2-x)( PO sub(4)) sub(3) (M: Cr, Al, Fe) by neutron diffraction and impedance spectroscopy

A systematic study of Li[sub 1+x]M[subx]Ti[sub 2-x](PO[sub 4][sub 3] with M=Al, Cr and Fe and 0 [< or=]x[< or]1 has been carried out by X-ray and neutron powder diffraction and by impedance spectroscopy. The analysis of the diffraction data allowed us to describe the disposition of the lithium...

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Bibliographic Details
Published in:Solid state ionics 2014-11, Vol.266, p.1-8
Main Authors: Perez-Estebanez, M, Isasi-Marin, J, Tobbens, D M, Rivera-Calzada, A, Leon, C
Format: Article
Language:English
Subjects:
Aluminum
Atomic structure
Chromium
Diffraction
Impedance spectroscopy
Iron
Lithium
Neutron diffraction
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Summary:A systematic study of Li[sub 1+x]M[subx]Ti[sub 2-x](PO[sub 4][sub 3] with M=Al, Cr and Fe and 0 [< or=]x[< or]1 has been carried out by X-ray and neutron powder diffraction and by impedance spectroscopy. The analysis of the diffraction data allowed us to describe the disposition of the lithium atoms within the structure. They were found to occupy two different positions, the well-known M1 and a new position called M2. We find indeed a correlation between the pre-exponential factor and the degree of disorder of the lithium atoms in the structure as determined from neutron diffraction data.
ISSN:0167-2738
DOI:10.1016/j.ssi.2014.07.018