Molten salt synthesis (MSS) of Cu{sub 2}Mo{sub 6}S{sub 8}-New way for large-scale production of Chevrel phases

Journal Article · Thu Jun 15 04:00:00 EDT 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.02.032· OSTI ID:20905325

Lancry, E ^[1]; Levi, E ^[1]; Mitelman, A ^[1]; Malovany, S ^[1]; Aurbach, D ^[1]

---

1. Department of Chemistry, Bar-Ilan University, Ramat-Gan, 52900 (Israel)

The Chevrel phase (CP), Mo{sub 6}S{sub 8}, was found to be an excellent cathode material for rechargeable magnesium batteries. Mo{sub 6}S{sub 8} is obtained by a leaching process of Cu{sub 2}Mo{sub 6}S{sub 8}, which removes the copper. A new method of Cu{sub 2}Mo{sub 6}S{sub 8} production was developed. In contrast to the well-known solid-state synthesis of CP, the method is based on the reaction in a molten salt media (KCl). A fast kinetics of this reaction allows using less active, but more convenient precursors (sulfides instead of sulfur), decreasing temperature and synthesis duration, as well as operation in the inert atmosphere instead of dynamic evacuated systems. It was shown that the composition and the electrochemical behavior of the products obtained by MSS and by the solid-state synthesis are identical. Thus, the molten salt method is extremely attractive for the large-scale production of the active materials for Mg batteries. - Graphical abstract: The layout of the molten salt synthesis system.

• OSTI ID: 20905325
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 6 Vol. 179; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATHODES
COPPER SULFIDES
ELECTRIC BATTERIES
ELECTROCHEMISTRY
INERT ATMOSPHERE
KINETICS
LEACHING
MOLTEN SALTS
MOLYBDENUM SULFIDES
POTASSIUM CHLORIDES
SYNTHESIS