High-performance stretchable triboelectric nanogenerators (STENGs) based on hierarchical auxetic films consisting of polyurethane (PU) foam and Ag electrode layers were fabricated. The high conformability and stretchability of the STENGs enable the dual-mode operation in both contact–separation and stretching–releasing modes. Compared with STENG devices with a single operation mode, our dual-mode STENG exhibits a high output voltage of 320 V and a current of 45 μA with an instantaneous output power density of 3 mW. The working principles of dual-mode STENG and the relationships between its output performance and the various types of mechanical motions were systematically studied, providing a working mode of STENGs for various practical applications. The high output power generation from dual-mode STENG can be used to operate light-emitting diodes and charge a wearable electronic device. The proposed energy harvester offers a promising way to provide power sources for micropower systems, stretchable electronics, and self-powered biomechanical sensors.

中文翻译：

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基于分层辅助结构的高性能双模摩擦发电纳米发电机

基于聚氨酯（PU）泡沫和银电极层组成的分层膨胀膜，制造了高性能可拉伸摩擦电纳米发电机（STENGs）。STENG的高度顺应性和可拉伸性使它能够在接触分离和拉伸释放两种模式下实现双模运行。与具有单一操作模式的STENG器件相比，我们的双模式STENG具有320 V的高输出电压和45μA的电流，瞬时输出功率密度为3 mW。系统地研究了双模式STENG的工作原理及其输出性能与各种类型的机械运动之间的关系，从而为各种实际应用提供了STENG的工作模式。双模STENG产生的高输出功率可用于操作发光二极管并为可穿戴电子设备充电。拟议中的能量收集器提供了一种有前途的方式来为微功率系统，可伸缩电子设备和自供电生物力学传感器提供电源。