Self-Powered Tactile\nSensors Embedded with Self-Healing\nElectrodes for Multifunctional Applications

Tactile-based sensing technology represents one of the\nmost promising\nmethods for interacting with their surrounding environment. Consequently,\nflexible tactile sensing has garnered significant attention from researchers\nworldwide. In this study, triboelectricity and piezoelectricity were\ncombined to propose a multifunctional self-powered tactile sensor\n(MSPTS). Notably, new and innovative self-healing electrodes were\nembedded and synthesized from HPDMS (poly(dimethylsiloxane)) and boric\nacid in the MSPTS, MSPTS demonstrated a linear detection range of\n0.25–5 kPa with a sensitivity of 246.28 mV/kPa, indicating\nsubstantial improvements in sensor sensitivity, output performance,\nand anti-interference capability. Our method of forming hydrogen bonds\nbetween a self-healing material (SHM) and a liquid metal (LM) effectively\naddressed the issue of LM leakage within the flexible matrix under\npressure, thus preventing sensor failure. The borate dynamic bonding\nconferred self-healing properties to the electrode when it was damaged.\nThe MSPTS was successfully applied to pressure detection, material\nidentification, and human body movement detection, significantly broadening\nthe application range of flexible electronic devices.