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High-capacity nanostructured germanium-containing materials and lithium alloys thereof

United States Patent

August 24, 2010
View the Complete Patent at the US Patent & Trademark Office
Electrodes comprising an alkali metal, for example, lithium, alloyed with nanostructured materials of formula Si.sub.zGe.sub.(z-1), where 0<z.ltoreq.1; formula Si.sub.zGe.sub.(z-1), where 0<z<1; and/or germanium exhibit a combination of improved capacities, cycle lives, and/or cycling rates compared with similar electrodes made from graphite. These electrodes are useful as anodes for secondary electrochemical cells, for example, batteries and electrochemical supercapacitors.
Graetz; Jason A. (Upton, NY), Fultz; Brent T. (Pasadena, CA), Ahn; Channing (Pasadena, CA), Yazami; Rachid (Los Angeles, CA)
California Institute of Technology (Pasadena, CA), Centre National de la Recherche Scientifique (C.N.R.S.) (Paris, FR)
10/ 829,598
April 22, 2004
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT Some aspects of this disclosure were made with the support of the Department of Energy of the U.S. Government through Basic Energy Sciences Grant No. DE-FG03-00ER15035. The U.S. Government may have certain rights in the invention.