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<p>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&#xa0;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&#xa0;K. This research provides an efficient and feasible energy harvesting pathway for utilizing carbon-based materials as thermoelectric materials.</p>

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A thermoelectric wristband based on single-walled carbon nanotubes for energy harvesting

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月23日

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  • Xudong Shen,
  • Yizhou Qi,
  • Mingzhu Yuan,
  • Dayi Chen,
  • Yiran Wang,
  • Yanwei Sun,
  • Ge Shi

摘要

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.