A thermoelectric wristband based on single-walled carbon nanotubes for energy harvesting
Abstract Single-walled carbon nanotubes (SWCNTs) have attracted increasing attention in wearable thermoelectric devices due to their extremely high strength and toughness. Here we introduce a flexible thermoelectric wearable wristband based on SWCNTs. High-performance SWCNTs films were successfully...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-12751-8 |
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| Summary: | Abstract Single-walled carbon nanotubes (SWCNTs) have attracted increasing attention in wearable thermoelectric devices due to their extremely high strength and toughness. Here we introduce a flexible thermoelectric wearable wristband based on SWCNTs. High-performance SWCNTs films were successfully fabricated through ultrasonic dispersion and heat-pressing processes, exhibiting a Seebeck coefficient of 42.5 µV/K and a maximum electrical conductivity of 3503 S/cm. The flexible films exhibited excellent bending durability, with an impedance increase of no more than 7.6% after 400 bending cycles.The width and length of the thermoelectric legs were optimized, and a wearable thermoelectric wristband was simulated by connecting the legs in series, thereby analyzing its total output power. Furthermore, a thermoelectric wristband was fabricated by spin-coating onto a flexible printed circuit (FPC) substrate, and it achieved a maximum output power of 10.7 µW under a temperature difference of 36.5 K. This research provides an efficient and feasible energy harvesting pathway for utilizing carbon-based materials as thermoelectric materials. |
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| ISSN: | 2045-2322 |