Flexible single-electrode triboelectric nanogenerators with MXene/PDMS composite film for biomechanical motion sensors

摘要

The increasing demand of portable electronics requires modern power sources to be flexible,wearable,durable,and waterproof.This work reports a flexible single-electrode triboelectric nanogenerator composed of MXene/ polydimethylsiloxane film.The effect of (MXene) content (wt%) and compressive force on the output performance of the as-prepared devices are systematically studied.A peak-to-peak open-circuit voltage of 225 V,shortcircuit current density of 30 μA cm~(-2),and a maximum power density of 10 mW cm~(-2) on a load resistance of 100 MΩ are obtained by periodically hand hammering a 2 × 4 cm~2 smart textile-based composite.The high output directly powers 80 green light emitting diodes connected in series without any additional power source.In addition to its application as a triboelectric nanogenerator,the textile-based composite is also implemented as a human motion sensor,detecting various human motions such as finger tapping,hand clapping,and hand hammering.Such lightweight smart textiles provide potential opportunities for multifunctional power sources and hence have promising applications in self-powered wearable electronics.