Structural and mechanistic features of intermetallic materials for lithium batteries
Document Type
Conference Proceeding
Publication Date
7-2001
Department
Department of Materials Science and Engineering
Abstract
An anode system based on intermetallic phases with a zinc-blende-type structure (InSb, GaSb and AlSb) has been studied for lithium-ion batteries. The compound, InSb, in particular, cycles well between 1.2 and 0.5 V. After an initial "conditioning" cycle, a mechanism involving lithium insertion into an open framework structure followed by indium extrusion in the potential range 1.2-0.7 V, appears to dominate; between 0.7 and 0.5 V, a more complex mechanism occurs involving indium extrusion from a stable fcc Sb anion array and subsequent lithiation of the extruded indium. In situ X-ray diffraction and extended X-ray analysis fine structure (EXAFS) data were obtained over the voltage window 1.2-0.5 V, where a rechargeable capacity of 300 mAh/g is achievable. The results indicate that after the "conditioning" reaction a LiyIn1-ySb zinc-blende framework, in which Li atoms partially substitute for In, is responsible for the good cycling behavior of the cells. Isostructural AlSb and GaSb electrodes provide inferior electrochemical capacities.
Publication Title
Journal of Power Sources
Recommended Citation
Vaughey, J.,
Johnson, C.,
Kropf, A.,
Benedek, R.,
Thackeray, M.,
Tostmann, H.,
Sarakonsri, T.,
Hackney, S. A.,
Fransson, L.,
Edström, K.,
&
Thomas, J.
(2001).
Structural and mechanistic features of intermetallic materials for lithium batteries.
Journal of Power Sources,
97-98, 194-197.
http://doi.org/10.1016/S0378-7753(01)00618-8
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/7533