Scalable-produced 3D elastic thermoelectric network for body heat harvesting

Yijie Liu, Xiaodong Wang, Shuaihang Hou, Zuoxu Wu, Jian Wang, Jun Mao, Qian Zhang (), Zhiguo Liu () and Feng Cao ()
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Yijie Liu: School of Physics, Harbin Institute of Technology
Xiaodong Wang: Harbin Institute of Technology
Shuaihang Hou: Harbin Institute of Technology
Zuoxu Wu: Harbin Institute of Technology
Jian Wang: Harbin Institute of Technology
Jun Mao: Harbin Institute of Technology
Qian Zhang: Harbin Institute of Technology
Zhiguo Liu: School of Physics, Harbin Institute of Technology
Feng Cao: Harbin Institute of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: 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−3), ultra-low thermal conductivity (0.04 W m−1 K−1), 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−2, even comparable to state-of-the-art bulk-based flexible thermoelectric generators.

Date: 2023
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DOI: 10.1038/s41467-023-38852-4

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