Porous organic filler for high efficiency of flexible thermoelectric generator

Title
Porous organic filler for high efficiency of flexible thermoelectric generator
Authors
김진상백승협김성근정성진임상순신준철권범진박형호
Keywords
Flexible thermoelectric module; Porous PDMS filler; Low thermal conductivity; Bi2Te3; Filler thickness
Issue Date
2021-03
Publisher
Nano energy
Citation
VOL 81, 105604
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/72355
ISSN
2211-2855
Appears in Collections:
KIST Publication > Article
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