About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Sustainable Thermoelectric Devices Made from Zinc and Magnetsium-Antimony Alloys |
| Author(s) |
Kornelius Nielsch, Pingjun Ying, Ran He, Amin Bahrami |
| On-Site Speaker (Planned) |
Kornelius Nielsch |
| Abstract Scope |
Thermoelectric technology has witnessed a resurgence in recent years due to increasing demands for sustainable energy sources and efficient cooling systems. Recently, the introduction of Te-free thermoelectric modules using non-toxic, abundant materials including p-type MgAgSb and n-type Mg3(Sb,Bi)2 marked a significant breakthrough. In this study, a thorough exploration of thermoelectric modules is conducted, focusing on their performance degradation under various conditions. Cycling tests in air reveal significant degradation, prompting the exploration of protective strategies. Surface coatings using atomic layer deposition (ALD) emerge as a promising solution, particularly by HfO2, demonstrating superior protective effects. In a further attempt, we have coated the grains of BiSb and ZnSb powders with ALD of metal oxides. This powder based ALD coatings lead to a significant enhancement of the thermal stability of these materials and for devices and suppresses in the case of ZnSb the formation of Zn whiskers. |