| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
|
| Presentation Title |
Decoupling of Electrical and Thermal Transport in CoSb3 Skutterudites by Compositing Effect |
| Author(s) |
Krushna Kumari Raut, Andrei Novitskii, Cédric Bourgès, Takao Mori |
| On-Site Speaker (Planned) |
Krushna Kumari Raut |
| Abstract Scope |
Thermoelectricity deals with the conversion of waste heat into electrical energy. This study focuses on enhancing the thermoelectric performance of skutterudite-based compounds through the decoupling of electrical and thermal transport by the addition of Bi to Co4Sb12. Compositional and phase analysis revealed that Bi stays as a secondary phase at the grain boundaries of the main phase. Consequently, a significant reduction of thermal conductivity is realized for the reactively sintered Bi-added Co4Sb12 samples. Additionally, temperature-dependent Seebeck coefficient shows the transition from the n-type to p-type conduction for all the conventionally synthesized Bi-added samples. In contrast, all reactive sintered Bi-added samples exhibited p-type conducting behavior is observed. This conduction switching is most likely due to the presence of Sb deficiency in the reactive sintered samples. Our findings suggest a novel approach to producing p-type skutterudites with notably lower thermal conductivity, which could be beneficial for thermoelectric applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Composites, Environmental Effects |