About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Alloys and Compounds for Thermoelectric and Solar Cell Applications XII
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Presentation Title |
Hierarchical Phonon Scattering from Nano to Macro Scale in Bismuth Telluride Bulk Composites and Cost-effective Module Structure |
Author(s) |
Jong-Soo Rhyee, Pooja Rawat, Anil Kumar |
On-Site Speaker (Planned) |
Jong-Soo Rhyee |
Abstract Scope |
We study the thermoelectric properties of a p-type Bi0.4Sb1.6Te3.4 (BST) composite with Ag nano-particle decorated TiO2 microparticles (Ag/TiO2). The dispersion of Ag/TiO2 particles, synthesized by an ultrasonication (US) and spray coating (SC) methods, into the matrix effectively decreases lattice and bipolar thermal conductivity. These reduced grain sizes, alongside nano-particle decorated microparticles dispersed throughout the matrix, scatter phonons effectively from long to short wavelength phonons and subsequently decrease lattice thermal conductivity. The significant suppression of lattice and bipolar thermal conductivity has led to an increase in the maximum zT value. We designed and fabricated new thermoelectric module with cost-effective methods. The new module design does not significantly deteriorate the module performance but have many merits such as high mechanical property, easy fabrication, and significant cost down. Therefore the promising new thermoelectric module structure using the performance enhanced thermoelectric composites can expand the practical applications with low cost and stable mechanical properties. |
Proceedings Inclusion? |
Planned: |