Ionic conductivity and crystal structure for the Li3−2xCr2−xTax(PO4)3 system

Ionic conductivity and crystal structure for the Li3−2xCr2−xTax(PO4)3 system

The monoclinic phase (P21/n) was formed for 0 < =x < =0.6 and the NASICON-type rhombohedral phase (Rc) was obtained for the region 0.8 < =x < =1.2 in the Li3-2xCr2-xTax(PO4)3 system. The activation energy for Li+ migration was ca. 0.45 eV for the monoclinic structure and ca. 0.36 eV for...

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Veröffentlicht in:Solid state ionics 2004-01, Vol.166 (1-2), p.53-59
1. Verfasser: Aono, H
Format: Artikel
Sprache:eng
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Zusammenfassung:The monoclinic phase (P21/n) was formed for 0 < =x < =0.6 and the NASICON-type rhombohedral phase (Rc) was obtained for the region 0.8 < =x < =1.2 in the Li3-2xCr2-xTax(PO4)3 system. The activation energy for Li+ migration was ca. 0.45 eV for the monoclinic structure and ca. 0.36 eV for the rhombohedral structure. The maximum conductivity of 8.4X10-6 S cm-1 at 298 K was obtained for x=0.8 of the Li3-2xCr2-xTax(PO4)3 system. The conductivity of LiCrTa(PO4)3 was enhanced about three to five times by the addition of the lithium salt due to the improvement of the sinterablity. The maximum conductivity was 2.4X10-5 S cm-1 at 298 K for LiCrTa(PO4)3-0.2Li3BO3.
ISSN:0167-2738
DOI:10.1016/j.ssi.2003.11.005