Harvesting low-speed wind energy is challenging for existing technologies. In this work, we developed a wake-galloping-driven triboelectric nanogenerator (TENG) (named WG-TENG) to effectively harvest breeze wind energy when the wind speed is as low as 1 ms⁻¹. The unique dynamics feature of wake galloping effect enables the proposed device a simple structure (minimalist contact-separation mode), low onset wind speed, lightweight (8.5 g), easy fabrication, and good portability. The relationship between the WG-TENG output performance and its structural parameters as well as bluff body geometries has been systematically studied. Attributed to the vibration enhancement realized by the wake galloping phenomenon and high efficiency of TENG at low-frequency, the proposed harvester not only can be used to drive small electronics, but also realizes a highly sensitive real-time wind speed monitoring system. This work realizes a miniaturized and high electrical performance wind-driven TENG for practical applications.

收集低速风能对现有技术具有挑战性。在这项工作中，我们开发了一种尾流驱动的摩擦纳米发电机（TENG）（命名为WG-TENG），以在风速低至1 ms ^{-1时有效地收集微风风能。}. 尾流舞动效应的独特动力学特性使所提出的装置结构简单（极简接触分离模式）、低起始风速、重量轻（8.5 g）、易于制造和良好的便携性。WG-TENG 输出性能与其结构参数以及钝体几何形状之间的关系进行了系统研究。由于尾流舞动现象实现的振动增强和TENG在低频下的高效率，所提出的收割机不仅可以用于驱动小型电子设备，还可以实现高灵敏度的实时风速监测系统。这项工作实现了用于实际应用的小型化和高性能风驱动TENG。