TiO 2−X based thermoelectric generators enabled by additive and layered manufacturing
| Autor: | Hwasoo Lee, Sanjay Sampath, Ramachandran Chidambaram Seshadri, Su Jung Han |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Interconnection Materials science Fabrication business.industry Mechanical Engineering 02 engineering and technology Building and Construction Management Monitoring Policy and Law 021001 nanoscience & nanotechnology 01 natural sciences General Energy Thermoelectric generator Thermocouple visual_art Waste heat 0103 physical sciences Thermoelectric effect visual_art.visual_art_medium Electronic engineering Optoelectronics Ceramic Electronics 0210 nano-technology business |
| Zdroj: | Applied Energy. 192:24-32 |
| ISSN: | 0306-2619 |
| Popis: | Traditional thermoelectric modules are acquired as separate components and then integrated by mechanical attachment into the engineering systems. There is, however, an interest and opportunity to manufacture thermoelectric device and basic electronics directly onto engineering structures. Recent studies have shown that plasma spray synthesized sub-stoichiometric titanium oxide (TiO 2−x ) deposits show reasonable thermoelectric figure-of-merit, are capable of operating at relatively high temperatures (∼500 °C), and can be easily and cost effectively deposited onto both planar and cylindrical substrates over large areas with the capability to produce patterned and multilayer assemblies to optimize the power harvesting. This study demonstrates the fabrication and performance of such thermoelectric generators based on n -type TiO 2−x and Ni as the surrogate p -type and interconnect structures embedded within ceramic deposits. Up to 72 thermocouple modules were prepared incorporating both series and parallel connections to augment the performance resulting in a max efficiency of 0.85% for the couple and electric power of 2.43 mW at temperature of 723 K. Preliminary experiments were conducted with Li:Co 3 O 4 as the p -type material with significant performance improvement. The methodologies described in this paper represents a potential pathway for large scale synthesis and fabrication of thermoelectric system directly in waste heat systems over large areas. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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