Na-Li exchange of Na1+xTi2-xAlx(PO4)3 (0.6 ≤ x ≤0.9) NASICON series:: a Rietveld and impedance study

被引：45
作者：
Mouahid, FE
Zahir, M
Maldonado-Manso, P
Bruque, S [1 ]
Losilla, ER
Aranda, MAG
Rivera, A
Leon, C
Santamaria, J
机构：
[1] Univ Malaga, Dept Quim Inorgan Cristalog & Mineral, E-29071 Malaga, Spain
[2] Univ Chouaib Doukkali, Fac Sci, Dept Chim, LPCM, El Jadida 24000, Morocco
[3] Univ Complutense Madrid, Dept Fis Aplicada 3, E-28040 Madrid, Spain
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2001年 / 11卷 / 12期
关键词：
D O I：
10.1039/b102918p
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ion exchange reactions have been tested in sodium-containing NASICON materials in order to prepare Li1+xAlxTi2-x(PO4)(3) compounds with high lithium content, x greater than or equal to0.6. However, the studied lithium exchange reactions are not complete and the final solids have an appreciable sodium content. Structural characterisation by the Rietveld method reveals that sodium partially remains at the M1 site and the M2 site is fully exchanged by Li+ cations. The electrical properties have been characterised by an impedance study. The Li-exchanged NASICONs have lower dc conductivities and higher activation energies than the pure sodium analogues. This is likely due to the mixed alkali effect and because some percolation pathways are disabled.
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页码：3258 / 3263
页数：6
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