Journal
NANO LETTERS
Volume 20, Issue 6, Pages 4445-4453Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c01225
Keywords
Stretchable thermoelectric generator; Nanolayered structure; Complex and dynamic surfaces; Green energy; Health monitoring
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Funding
- National Science Foundation (NSF) [CMMI 1151191, CMMI 1663663]
- USC Epstein Institute-USA
- USC Honda Research Institute-USA
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Thermoelectric generators (TEGs) provide a unique solution for energy harvesting from waste heat, presenting a potential solution for green energy. However, traditional rigid and flexible TEGs cannot work on complex and dynamic surfaces. Here, we report a stretchable TEG (S-TEG) (over 50% stretchability of the entire device) that is geometrically suitable for various complex and dynamic surfaces of heat sources. The S-TEG consists of hot-pressed nanolayered p-(Sb2Te3) and n-(Bi2Te3)-type thermoelectric couple arrays and exploits the wavy serpentine interconnects to integrate all units. The internal resistance of a 10 X 10 array is 22 ohm, and the output power is similar to 0.15 mW/cm(2) at Delta T = 19 K on both developable and nondevelopable surfaces, which are much improved compared with those of existing S-TEGs. The energy harvesting of S-TEG from the dynamic surfaces of the human skin offers a potential energy solution for the wearable devices for health monitoring.
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