Presentation Information
[7p-N406-3]Enhancing Thermoelectric Conversion via Structural Engineering: Ductile Ag Chalcogenide-Based Stair-Shaped FTEG
〇(P)Suresh Prasanna Chandrasekar1,2, Musaddiq Al Ali1, Artoni Kevin R. Ang1,2, Masaharu Matsunami1, Tsunehiro Takeuchi1,2 (1.Toyota Technological Institute, 2.JST Mirai)
Keywords:
Flexible thermoelectric,Self-powered,wearable electronics
Flexible thermoelectric generators (FTEGs) are at the forefront of powering next-generation wearable and self-sustained electronic devices. In this work, we report the design and fabrication of a novel stair-shaped FTEG architecture utilizing ductile Ag-chalcogenide based thermoelectric materials for both n-type and p-type legs.
The inherent ductility of the material at room temperature, allows us to fabricate a 0.2 mm thick flexible free-standing film via simple mechanical rolling. As shown in Fig. 1, the unique stair-step geometry offers a transformative approach by redirecting the natural out-of-plane heat flow into the in-plane direction, enabling a significantly higher effective temperature gradient ( T) across the thermoelectric legs without the need for external heat concentrators or structural modifications. The heat flow and its associated output power in the proposed stair-shaped FTEG was optimized using finite elemental via COMSOL Multiphysics which revealed a promising output power, coupled with effectively high thermal gradient.
The preliminary results on fabrication of such device with only n-type TE leg exhibited a appealing output power of 5.7mW at a T of ~ 20 K with a normalized power density of 0.017 µW/cm2K2. These findings highlight the potential of our design strategy for advanced self-powered wearable electronic applications.
The inherent ductility of the material at room temperature, allows us to fabricate a 0.2 mm thick flexible free-standing film via simple mechanical rolling. As shown in Fig. 1, the unique stair-step geometry offers a transformative approach by redirecting the natural out-of-plane heat flow into the in-plane direction, enabling a significantly higher effective temperature gradient ( T) across the thermoelectric legs without the need for external heat concentrators or structural modifications. The heat flow and its associated output power in the proposed stair-shaped FTEG was optimized using finite elemental via COMSOL Multiphysics which revealed a promising output power, coupled with effectively high thermal gradient.
The preliminary results on fabrication of such device with only n-type TE leg exhibited a appealing output power of 5.7mW at a T of ~ 20 K with a normalized power density of 0.017 µW/cm2K2. These findings highlight the potential of our design strategy for advanced self-powered wearable electronic applications.