Thermoelectric materials and their manufacturing method
Disclosed is a thermoelectric conversion material with high performance. The thermoelectric material according to the present disclosure may be represented by the following chemical formula 1: Cu x Se <Chemical Formula 1> where 2<x≤2.6.
1. A thermoelectric material, represented by the following chemical formula 1:
Cu x Se <Chemical Formula 1>
where 2<x≤2.2, and
wherein the thermoelectric material has a ZT value greater than or equal to 0.3 over a temperature range of 100° C. to 600° C.
2. The thermoelectric material according to claim 1 , wherein x≤2.15 in the chemical formula 1.
3. The thermoelectric material according to claim 1 , wherein x≤2.1 in the chemical formula 1.
4. The thermoelectric material according to claim 1 , wherein 2.01≤x in the chemical formula 1.
5. The thermoelectric material according to claim 1 , wherein 2.025≤x in the chemical formula 1.
6. A thermoelectric conversion element comprising a thermoelectric material according to claim 1 .
7. A thermoelectric power generator comprising a thermoelectric material according to claim 1 .
8. The thermoelectric material according to claim 1 , wherein the thermoelectric material has a thermal diffusivity that is less than or equal to 0.5 mm 2 /s over a temperature range of 100 to 600° C.
9. The thermoelectric material according to claim 1 , wherein the thermoelectric material is prepared by forming a copper-selenium compound by a solid-state reaction (SSR) process.
10. The thermoelectric material according to claim 1 , wherein the thermoelectric material has a thermal diffusivity of less than 0.5 mm 2 /s over a temperature range of 100 to 600° C.
11. The thermoelectric material according to claim 1 , wherein the thermoelectric material has a thermal diffusivity of less than 0.4 mm 2 /s over a temperature range of 100 to 600° C.