The ternary phase diagram Sb-Sn-Ti

Autor(en)
Patric Berger, Clemens Schmetterer, Herta Effenberger, Hans Flandorfer
Abstrakt

The ternary intermetallic compound SbSnTi is known for a reversible uptake of Li at low potentials versus pure Li and is therefore a candidate as anode material for use in Li-ion batteries (LiBs). Up to now, no phase diagram data for the ternary Sb-Sn-Ti system have been reported in literature, which is, however, crucial for the understanding of the lithiation process. In this work isothermal sections of this system at 600 °C, 800 °C and 1000 °C were acquired for the first time. They are based on powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM/EDX) investigations of alloy samples. During our investigations two new ternary phases, SbxSn19-xTi15 and (SbxSn1-x)3-yTi5+y, were recognized from PXRD patterns; the crystal structures were subsequently determined by single-crystal X-ray diffraction. SbxSn19-xTi15 crystallizes with the cubic space group Pm-3 (No. 200), the lattice parameter is a = 8.8502 Å. (SbxSn1-x)3-yTi5+y shows tetragonal symmetry with the lattice parameters a = 10.553 Å and c = 5.3982 Å and the space group I4/mcm (No. 140). A further ternary compound, Sb4SnTi5, could be identified; its incommensurate crystal structure could not yet be fully described.

Organisation(en)
Institut für Anorganische Chemie - funktionelle Materialien, Institut für Physikalische Chemie, Institut für Mineralogie und Kristallographie
Journal
Journal of Alloys and Compounds
Band
879
Anzahl der Seiten
14
ISSN
0925-8388
DOI
https://doi.org/10.1016/j.jallcom.2021.160272
Publikationsdatum
10-2021
Peer-reviewed
Ja
ÖFOS 2012
104003 Anorganische Chemie, 104017 Physikalische Chemie, 104011 Materialchemie, 105113 Kristallographie
Schlagwörter
ASJC Scopus Sachgebiete
Mechanics of Materials, Mechanical Engineering, Metals and Alloys, Materials Chemistry
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/the-ternary-phase-diagram-sbsnti(3682b579-f3dd-4cce-94ca-730c85477ba5).html