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Thermoelectric materials having porosity

United States Patent

August 5, 2014
View the Complete Patent at the US Patent & Trademark Office
A thermoelectric material and a method of making a thermoelectric material are provided. In certain embodiments, the thermoelectric material comprises at least 10 volume percent porosity. In some embodiments, the thermoelectric material has a zT greater than about 1.2 at a temperature of about 375 K. In some embodiments, the thermoelectric material comprises a topological thermoelectric material. In some embodiments, the thermoelectric material comprises a general composition of (Bi.sub.1-xSb.sub.x).sub.u(Te.sub.1-ySe.sub.y).sub.w, wherein 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1, 1.8.ltoreq.u.ltoreq.2.2, 2.8.ltoreq.w.ltoreq.3.2. In further embodiments, the thermoelectric material includes a compound having at least one group IV element and at least one group VI element. In certain embodiments, the method includes providing a powder comprising a thermoelectric composition, pressing the powder, and sintering the powder to form the thermoelectric material.
Heremans; Joseph P. (Upper Arlington, OH), Jaworski; Christopher M. (Columbus, OH), Jovovic; Vladimir (Pasadena, CA), Harris; Fred (Duncanville, TX)
ZT Plus (Azusa, CA), The Ohio State University (Columbus, OH)
13/ 436,521
March 30, 2012
STATEMENT REGARDING FEDERALLY SPONSORED R&D This invention was made with government support under grant number 10-B-DOE100109-001 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.