Sustainable Soft Electronic Devices by High‐Performance Recyclable Elastomers and Conductors

ABSTRACT Soft electronics have driven emerging advancements, which are expected to have wide‐range and large‐scale applications in health management, electronic skins, soft robotics, and interactive human‐machine interfaces. However, existing strategies mainly focus on isolated components, and system‐level soft electronic devices combining sustainable fabrication, robust performance, and versatile integrated functions have rarely been explored. Herein, we develop a recyclable soft electronic system enabled with multifunctional poly thioctic acid (TA) elastomer and high‐performance elastic metallic conductors. The multifunctional TA elastomer exhibits an exceptional combination of stretchability (435% strain), fracture energy (5.5 kJ/m 2 ), apparent adhesion energy on Cu (10.7 kJ/m 2 ), and thermal conductivity (0.69 W/m·K). These properties enable robust mechanical and electronic interfacing with different electronic components for sustainable soft circuits, while also endowing the electronic systems with outstanding self‐healing and recycling capabilities. Furthermore, by integrating with printable and recyclable elastic conductors based on eutectic liquid metals, the sustainable soft electronic systems can fully restore circuit functionality after complete mechanical rupture with the selfhealing capability of the composite elastomer and the elastic conductor. The system can be reprocessed to achieve full functionality restoration. The materials strategy developed in this study renders a promising solution for the development of soft and sustainable electronic devices.