Jinsil Kim, Fabio Cicoira
), high stretchability (>650%), strong self-adhesion, and stable performance under repeated deformation. Importantly, the material supports both mechanical reuse and chemical recycling over at least 15 cycles, retaining more than 90% of its mechanical strength and fully recovering its electrical conductivity. Mechanistic investigations reveal that reversible disulfide exchange and hydrogen bond reformation govern rapid network reorganization and efficient self-repair. Printed electronic tattoos and free-standing electrodes fabricated from this composite deliver low-impedance and high-fidelity electrocardiogram (ECG) recordings. Together, these results establish a sustainable and versatile materials platform that advances self-healing conductors beyond superficial damage, providing a practical pathway toward durable and recyclable bioelectronic materials and devices.