Broad-Range-Response Battery-Type All-in-one Self-Powered Stretchable Pressure-Sensitive Electronic Skin

Highly sensitive self-powered stretchable electronic skins with the capability of detecting broad-range dynamic and static pressures are urgently needed with the increasing demands for miniaturized wearable electronics, robots, artificial intelligence, etc. However, it remains a great challenge to achieve this kind of electronic skins. Here, unprecedented battery-type all-in-one self-powered stretchable electronic skins with a novel structure composed of pressure-sensitive elastic vanadium pentoxide (V2O5) nanowire-based porous cathode, elastic porous polyurethane /carbon nanotube/polypyrrole anode, and polyacrylamide ionic gel electrolyte are reported. A new battery-type self-powered pressure sensing mechanism involving the output current variation caused by the resistance variation of the electrodes and electrolytes under external pressure is revealed. The battery-type self-powered electronic skins combining high sensitivity, broad response range (1.8 Pa-1.5 MPa), high fatigue resistance, and excellent stability against stretching (50% tensile strain) are achieved for the first time. This work provides a new and versatile battery-type sensing strategy for the design of next-generation all-in-one self-powered miniaturized sensors and electronic skins. Novel battery-type all-in-one self-powered stretchable pressure sensors based on elastic porous nanocomposite electrodes are developed. The sensors combine high stretchability, high sensitivity, ultrabroad response range, and excellent fatigue resistance. It can be applied for various physical signals monitoring and broad-range-response pressure-sensitive electronic skins. This versatile battery-type sensing strategy can be used to design various miniaturized self-powered sensors.image