期刊
NANO ENERGY
卷 81, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105604
关键词
Flexible thermoelectric module; Porous PDMS filler; Low thermal conductivity; Bi2Te3; Filler thickness
类别
资金
- R&D Convergence Program of NST (National Research Council of Science and Technology) of Republic of Korea [CAP-14-01-KIST]
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF2020M3D1A111049911]
This study introduces flexible TEMs made of porous PDMS fillers and Bi2Te3-based thermoelectric legs, in which the low thermal conductivity of the filler suppresses heat conduction, leading to an increase in temperature difference and enhancing power density and figure of merit.
Flexible thermoelectric modules (TEMs) are often built with a polymer filler as structural support. However, the filler may serve as a thermal bypass, leading to reduced temperature difference across a TEM and degradation of the output. Herein, we present flexible TEMs made of porous PDMS fillers and Bi2Te3-based thermoelectric legs. The heat conduction through the filler is suppressed by leveraging the low thermal conductivity of porous PDMS (0.08 W/m.K), leading to an increase in the temperature difference across the TEMs. The porous PDMS TEM exhibits 23% enhanced power density and a figure of merit (ZT) of 0.75 around the room temperature. Lastly, the efficacy of the porous PDMS TEM is demonstrated by testing the TEMs with body heat. Our approach would offer a promising insight into the flexible TEM designs.
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