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Updated: Aug 9, 2025

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Published on: February 5, 2020

High-Performance Stretchable Thermoelectric Generator for Self-Powered Wearable Electronics.

Wusheng Fan¹, Zijian An², Feng Liu¹

¹State Key Laboratory of Silicon Materials, and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|February 17, 2023

Summary

This study presents a new stretchable thermoelectric generator (TEG) that efficiently converts body heat into electricity. The wearable device achieves high power densities, enabling self-powered electronics like LEDs and ECG modules.

Keywords:

self-powered thermoelectric generator thermoelectric performance wearable electronics

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Last Updated: Aug 9, 2025

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Area of Science:

Materials Science
Energy Harvesting
Wearable Technology

Background:

Wearable thermoelectric generators (TEGs) offer a path to self-powered wearable electronics by converting body heat to electricity.
Current TEGs face limitations in power density, hindering widespread practical application.

Purpose of the Study:

To develop a stretchable TEG with enhanced wearability and improved power output.
To demonstrate the practical application of the TEG in powering electronic devices.

Main Methods:

Fabrication of a novel stretchable thermoelectric generator.
Performance testing of the TEG under various conditions (temperature, airflow).
Integration and real-time operation testing with a light-emitting diode (LED) and an electrocardiogram (ECG) module.

Main Results:

The stretchable TEG achieved high power densities, reaching 13.8 µW cm⁻² (breezeless) and 71.8 µW cm⁻² (2 m s⁻¹ air speed) at 15°C ambient temperature.
The device demonstrated comfortable wearability.
Successfully powered a commercial LED and continuously drove an ECG module without external power sources.

Conclusions:

The developed stretchable TEG significantly enhances power generation capabilities for self-powered wearable systems.
The device shows great potential for practical applications in powering wearable electronics and medical monitoring devices.