ABSTRACT
Oxide materials are considered to be promising for future thermoelectric applications, since they have
many advantages such as nontoxicity, thermal stability, high oxidation resistance, etc. Oxide materials
had been ignored for a long time by the thermoelectric community, but the discovery of Na
CoO
as a
strong candidate thermoelectric material in 1997
lit a fire in the researchers’ minds to explore high-
efficiency oxide materials.
