Thermoelectric generators (TEGs) are an excellent candidate for powering wearable electronics and the ‚ÄòInternet of Things‚Äô, due to their capability of directly converting heat to electrical energy. Here we report a high-performance wearable TEG with superior stretchability, self-healability, recyclability and Lego-like reconfigurability, by combining modular thermoelectric chips, dynamic covalent polyimine, flowable liquid metal electrical wiring in a novel mechanical architecture design of ‚Äúsoft motherboard-rigid plugin modules‚Äù. A record-high open-circuit voltage of 1 V/cm2 at temperature difference 95 K is achieved. Furthermore, this TEG is integrated with a wavelength-selective metamaterial film on the cold side, leading to greatly improved device performance under solar irradiation, which is critically important for wearable energy harvesting during outdoor activities. The unique properties and design concepts of TEGs reported here can pave the way for delivering the next-generation high-performance, adaptable, customizable, durable, economical and eco-friendly energy harvesting devices with wide applications.

Stretchable, Self-healable, Recyclable, and Lego-like Reconfigurable Thermoelectric Generator for Wearable Energy Harvesting

The Virtual Technical Meeting of the Society of Engineering Science 2020 is the first fully virtual meeting of the SES community to envision and connect during the hiatus created by Covid-19, providing a platform for the exchange of ideas, and to showcase the latest research in the field of engineering science.

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