Energy harvesting technology of converting wind energy into available electricity is of great significance. Yet efficiently extracting wind energy at low wind speed still needs to be improved. A gaslloping triboelectric nanogenerator (GTENG) based on contact electrification between two flexible beams is proposed, resulting in a significant advancement of the TENG’s performance under low wind speeds. The impact behavior occurs between a main beam attached with a bluff body subjected to cross flows and an auxiliary beam in the case of beyond critical wind speed. The coupled interaction between the two beams is investigated, and different contact modes have been observed. A theoretical model is constructed to further understand the working mechanism and oscillating behaviors of the GTENG. The GTENG with a 3cm × 3cm TENG cell achieves an output voltage of over 200V at a low wind speed of 1.4m/s. In addition, it is meaningful that the average output power at 1.4m/s reaches 60% of that at a relatively high wind speed of 6m/s, which demonstrates the high output efficiency of GTENG under low wind speed. The nanogenerator’s environmental adaptability is unveiled at an air-conditioner vent, indicating that the GTENG is promising to drive electric devices in outdoor environments.

将风能转化为可用电能的能量收集技术具有重要意义。然而，仍然需要改进以低风速有效地提取风能的方法。提出了一种基于两个柔性梁之间接触带电的气扑式摩擦电纳米发电机（GTENG），从而大大提高了TENG在低风速下的性能。在超过临界风速的情况下，冲击行为发生在附有受横流作用的钝体的主梁和辅助梁之间。研究了两个光束之间的耦合相互作用，并且观察到了不同的接触模式。构建理论模型以进一步了解GTENG的工作机理和振动行为。具有3cm×3cm TENG单元的GTENG在1.4m / s的低风速下可达到200V以上的输出电压。另外，有意义的是，1.4m / s的平均输出功率达到6m / s较高风速时的平均输出功率的60％，这表明GTENG在低风速下具有高输出效率。纳诺发电机的环境适应性在空调通风口处公开，表明GTENG有望在户外环境中驱动电子设备。