Flexible Triboelectric–Piezoelectric Hybridized Self‐Powered Pressure Sensor Based on Micro‐Nano Hierarchical Interface

Abstract Self‐powered wearable sensors play a vital role in various fields such as healthcare, sports science, ergonomics, and virtual reality. In this study, we present a flexible self‐powered pressure sensor based on piezoelectric and triboelectric effects. The multilayer sensor features a structure comprising a polyethylene terephthalate (PET) layer with a controllable microstructure, a composite nanofiber layer using polyvinylidene fluoride (PVDF) and multiwall carbon nanotubes (MWCNTs) fabricated via electrospinning, and conductive fiber layers as electrodes. The sensitivity of the triboelectric–piezoelectric hybridized sensor can reach twice that of the original sensor. The self‐powered pressure sensor exhibits excellent sensitivity at 48.48 mv/kPa and maintains stability after 10 000 cycles. Due to the super‐flexibility and excellent biocompatibility, the sensor can be comfortably attached to the human body. Furthermore, the pressure sensor is capable of recognizing various human movements through corresponding electrical signals. This sensor holds promising application potential in areas such as gesture recognition, health assessment, human‐machine interfaces, and more.