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Wearable multi-sensing double-chain thermoelectric generator.

Dan-Liang Wen1, Hai-Tao Deng1, Xin Liu1

  • 1School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731 China.

Microsystems & Nanoengineering
|September 27, 2021
PubMed
Summary

This study introduces a flexible double-chain thermoelectric generator (DC-ThEG) for wearable electronics. The DC-ThEG harvests heat energy and simultaneously senses water molecules and temperature, enabling self-powered microsystems.

Keywords:
Electrical and electronic engineeringNanoscale devices

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Wearable Technology

Background:

  • Wearable electronics are crucial for AI development, with a trend towards integrated microsystems.
  • Current thermoelectric generators (ThEGs) primarily focus on energy harvesting.

Purpose of the Study:

  • To develop a novel wearable thermoelectric generator (ThEG) with a double-chain configuration.
  • To enable simultaneous sustainable energy harvesting and multi-functional sensing in a single device.

Main Methods:

  • Fabrication of a flexible DC-ThEG using screen printing of thermoelectric inks on a polymeric substrate.
  • Integration of silk fibroin as a functional layer for sensing water molecules and temperature.
  • Experimental characterization of powering and sensing functionalities.

Main Results:

  • The DC-ThEG demonstrated a 151 mV open-circuit voltage and a 3.3 V output for powering wearable electronics.
  • Successful harvesting of biothermal energy to power a commercial calculator.
  • The device exhibited simultaneous energy harvesting and dual-mode sensing capabilities.

Conclusions:

  • The developed DC-ThEG offers a cost-efficient, flexible, and high-performance solution for integrated powering and sensing.
  • This novel double-chain configuration advances thermoelectric generator technology for self-powered wearable microsystems.
  • The findings pave the way for next-generation all-in-one wearable devices.