New lithium-ion conductors based on the NASICON structure

Citation
V. Thangadurai et al., New lithium-ion conductors based on the NASICON structure, J MAT CHEM, 9(3), 1999, pp. 739-741
Citations number
18
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS CHEMISTRY
ISSN journal
09599428 → ACNP
Volume
9
Issue
3
Year of publication
1999
Pages
739 - 741
Database
ISI
SICI code
0959-9428(199903)9:3<739:NLCBOT>2.0.ZU;2-R
Abstract
Lithium-ion conduction in mixed-metal phosphates, (LiMMIII)-M-V(PO,), [M-V = Nb, Ta; M-III = Al, Cr, Fe], possessing the rhombohedral (R (3) over bar c) NASICON structure has been investigated. Among the phosphates investigat ed, LiTaAl(PO4)(3) exhibits the highest conductivity, sigma approximate to 1.0 x 10(-2) S cm(-1) at 350 degrees C (E-a = 0.47 eV), comparable to the c onductivity of LiTi2(PO4)(3). Unlike LiTi2(PO4)(3) which contains lithium-r educible Ti-IV, LiTaAl(PO4)(3) contains stable Ta-V and Al-III oxidation st ates and hence deserves further attention towards tailoring new lithium-ion conductors for application as electrolytes in solid state lithium batterie s.