About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIV
|
| Presentation Title |
Exploration of New Half-Heusler Compositions to Achieve Carbon Neutrality |
| Author(s) |
Kazuki Imasato |
| On-Site Speaker (Planned) |
Kazuki Imasato |
| Abstract Scope |
As an innovative application of thermoelectric technology toward carbon neutrality, we explore the potential of integrating thermoelectric devices into biochar pyrolysis systems. Current commercial thermoelectric materials, such as Bi₂Te₃, suffer from insufficient mechanical stability and limited high-temperature durability, making the development of alternative materials essential for such applications. Half-Heusler (HH) compounds emerge as promising candidates for thermoelectric modules in biochar plants. However, their inherently high thermal conductivity has hindered performance enhancement. To address this, we have developed double and triple Half-Heusler compositions with significantly reduced lattice thermal conductivity (<3 W/mK), lower than that of conventional HH materials. Furthermore, by leveraging the valence electron count concept, p-type to n-type conduction transitions can be achieved without the need for extrinsic dopants. These advancements offer valuable design strategies for identifying high-performance compositions that enable efficient thermoelectric devices for carbon-neutral energy systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Electronic Materials, Characterization |