| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
|
| Presentation Title |
A Robust Thermoelectric Module Based on MgAgSb/Mg3(Sb,Bi)2 with a Conversion Efficiency of 8.5% and a Maximum Cooling of 72 K |
| Author(s) |
Pingjun Ying, Lennart Wilkens, Heiko Reith, Nicolas Perez Rodriguez, Xiaochen Hong, Qiongqiong Lu, Christian Hess, Kornelius Nielsch, Ran He |
| On-Site Speaker (Planned) |
Pingjun Ying |
| Abstract Scope |
The applications of thermoelectric technology around room temperature are monopolized by bismuth telluride. However, due to the toxicity and scarcity of tellurium (Te), it is vital to develop a next-generation technology to mitigate the potential bottleneck in raw material supply for a sustainable future. Hereby, we develop a Te-free n-type compound Mg3Sb0.6Bi1.4 for near-room-temperature applications. Together with the p-type MgAgSb, we demonstrate module-level conversion efficiencies of 3% and 8.5% under temperature differences of 75 K and 260 K, respectively, and concomitantly a maximum cooling of 72 K when the module is used as a cooler. Besides, the module displays exceptional thermal robustness with a < 10% loss of the output power after thermal cycling for ∼32000 times between 323 K and 500 K. These proof-of-principle demonstrations will pave the way for robust, high-performance, and sustainable solid-state power generation and cooling to substitute highly scarce and toxic Bi2Te3. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |