Structural and mechanistic features of intermetallic materials for lithium batteries.

Vaughey, J. T. ; Johnson, C. S. ; Kropf, A. J. ; Benedek, R. ; Thackeray, M. M. ; Tostmann, H. ; Sarakonsri, T. ; Hackney, S. ; Fransson, L. ; Edstrom, K. ; Thomas, J. O.

Technical Information Center Oak Ridge Tennessee

关键词: Batteries;    Intermetallic compounds;    Structural properties;    Mechanistic properties;    Lithium;   

RP-ID  :  DE2001757556

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A new anode system based on intermetallic phases with a zinc-blende-type structure (inSb, GaSb and AISb) has been studied for lithium-ion batteries. The compound, InSb, in particular, cycles well and operates under various mechanisms depending on voltage window used. In the potential range 1.2 V to 0.6 V, a mechanism involving lithium insertion into an open framework structure followed by indium extrusion appears to dominate; between 0.6 V and 0.0 V, a more complex mechanism involving indium extrusion from a stable Sb anion array and subsequent lithiation of the extruded indium contributes to the electrode capacity. In-situ X-ray diffraction and extended X-ray analysis fine structure (EXAFS) data were obtained over the voltage window 1.2 V to 0.5 V, where a rechargeable capacity of 300 mAh/g is achievable.