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All-Printed Flexible Hygro-Thermoelectric Paper Generator.

Haoyu Shen1, Ke Xu1, Yulong Duan1

  • 1School of Light Industry and Engineering, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Rd., 381#, Tianhe District, Guangzhou, Guangdong, 510640, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 22, 2023
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Summary

This study presents a printed paper generator that harvests energy from humidity and temperature changes. It achieves significant voltage output, enabling self-powered systems and sustainable energy solutions.

Keywords:
hygro-thermoelectricityhygrothermal resourcesion-electron inkpaper generatorsustainability

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Nanotechnology

Background:

  • Renewable energy generation from ambient hygrothermal resources is crucial for self-powered systems.
  • Existing thermoelectric generators face limitations in efficiency and operational scope.

Purpose of the Study:

  • To demonstrate an all-printed flexible hygro-thermoelectric paper generator.
  • To achieve synergistic utilization of moist-diffusion, Soret, and Seebeck effects for enhanced energy generation.
  • To develop a sustainable and cost-efficient energy harvesting strategy.

Main Methods:

  • Fabrication of a printable ion-electron conductive ink using a Bi2Te3/PEDOT:PSS matrix and hygroscopic glycerol.
  • Integration of bifunctional mobile ions and electrons for synergistic effect utilization.
  • Characterization of the generator's output under hygrothermal conditions.

Main Results:

  • The generator exhibits an unconventional hygro-thermoelectric output pattern.
  • Achieved a significant increase in hygro-thermopower (26.70 mV K⁻¹ positive, -15.71 mV K⁻¹ negative).
  • A single generator produced up to 680 mV with volt-sized amplitudes.

Conclusions:

  • The developed hygro-thermoelectric generator offers a revolutionary approach to hybrid energy harvesting.
  • The technology is cost-efficient, flexible, sustainable, and suitable for large-scale roll-to-roll production.
  • Enables cable-free, self-powered systems operating globally without climatic or geographic constraints.