Scalable-produced 3D elastic thermoelectric network for body heat harvesting.
basic_science · Level V
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- Record sourced from PubMed, PMID 37244924.
- Also identified by DOI 10.1038/s41467-023-38852-4 and PMC identifier 10224941.
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Abstract
Flexible thermoelectric generators can power wearable electronics by harvesting body heat. However, existing thermoelectric materials rarely realize high flexibility and output properties simultaneously. Here we present a facile, cost-effective, and scalable two-step impregnation method for fabricating a three-dimensional thermoelectric network with excellent elasticity and superior thermoelectric performance. The reticular construction endows this material with ultra-light weight (0.28 g cm<sup>-3</sup>), ultra-low thermal conductivity (0.04 W m<sup>-1</sup> K<sup>-1</sup>), moderate softness (0.03 MPa), and high elongation (>100%). The obtained network-based flexible thermoelectric generator achieves a pretty high output power of 4 μW cm<sup>-2</sup>, even comparable to state-of-the-art bulk-based flexible thermoelectric generators.