Wind energy is one of the most cost-effective energy sources available today. Some techniques have been developed to scavenge wind energy, but making use of lower flutter velocity while maintaining high conversion efficiency remains challenging. Here, we report a triboelectric nanogenerator composed of two interacting triboelectric films with four flapping modes, enabling an effective work wind velocity as low as 1.6 ms⁻¹ and a high conversion efficiency of 3.23%, which, to our knowledge, are better than previously reported values of wind energy scavenging. The output performance of B-TENG can be determined by device size and flow velocity; the optimized device exhibits an output voltage, current, and power of 175 V, 43 μA, and 2.5 mW, respectively, with dimensions of 3 × 8 × 2 cm³ at a flow velocity of 8 ms⁻¹. The B-TENG may pave the way for future wind scavenging devices for a range of point-of-use applications.

风能是当今可用的最具成本效益的能源之一。已经开发了一些技术来消除风能，但是在保持高转换效率的同时利用较低的颤动速度仍然是挑战。在这里，我们报告了一个摩擦电纳米发电机，它由两个相互作用的摩擦电薄膜组成，具有四个拍动模式，使有效的工作风速低至1.6 ms ^-1，转换效率高达3.23％，据我们所知，这比以前更好报告了清除风能的价值。B-TENG的输出性能可以通过设备尺寸和流速来确定。经过优化的器件的输出电压，电流和功率分别为175 V，43μA和2.5 mW，尺寸为3×8×2 cm ³流速为8 ms ^-1。B-TENG可能会为将来在一系列使用点应用中的扫风设备铺平道路。