The ternary phase diagram Sb-Sn-Ti

Patric Berger; Clemens Schmetterer; Herta Effenberger; Hans Flandorfer

doi:10.1016/j.jallcom.2021.160272

Titel

The ternary phase diagram Sb-Sn-Ti

Autor*in

Patric Berger

Institut für Anorganische Chemie - funktionelle Materialien, Fakultät für Chemie, Universität Wien

Clemens Schmetterer

Institut für Physikalische Chemie, Fakultät für Chemie, Universität Wien

Herta Effenberger

Institut für Mineralogie und Kristallographie, Fakultät für Geowissenschaften, Geographie und Astronomie, Universität Wien

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Abstract

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.

Stichwort

IntermetallicsPhase diagramsX-ray diffractionCrystal structure

Objekt-Typ

journal article

Sprache

Englisch [eng]

Persistent identifier

phaidra.univie.ac.at/o:1437418

DOI

10.1016/j.jallcom.2021.160272

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