Minimizing start-up wind speed, reducing material wear and enhancing power density are three pivotal concerns for the TENG for harvesting wind energy. Here, a wind speed adaptive triboelectric nanogenerator (WSA-TENG) via a synergistic mechanism of magnetic and centrifugal forces is proposed. Owing to this new mechanical synergistic mechanism, WSA-TENG can operate in non-contact mode at low wind speed and in soft contact mode at high wind speed. This is significantly different from the previously reported TENGs with dual-mode automatic switching mode. As a result, WSA-TENG simultaneously achieves low start-up wind speed (1.6 m/s), enhanced durability and high power density, which enables WSA-TENG ideal for wind energy harvesting in the actual environment. WSA-TENG can achieve the maximum peak power density of 64.2 mW·m^-2·m^-1s at 3.3 m/s wind speed. Moreover, it can maintain 99.4% of initial electrical output after continuous operation of 90,000 cycles. The demonstrations show that WSA-TENG can supply power to temperature/humidity sensor and transmitter to realize wireless real-time monitoring of temperature/humidity and realize wind speed monitoring through electrical signal analysis, which has great potential applications in intelligent street lamp system. This work provides a strategy for simultaneously lowing start-up wind speed, boosting durability and improving power density of TENG.

中文翻译：

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用于智能路灯系统的低启动风速自适应摩擦电纳米发电机，通过磁力和离心力的协同机制提高耐久性和高功率密度


最大限度地减少启动风速、减少材料磨损和提高功率密度是 TENG 收集风能的三个关键问题。本文提出了一种利用磁力和离心力协同机制的风速自适应摩擦纳米发电机 （WSA-TENG）。由于这种新的机械协同机制，WSA-TENG 可以在低风速下以非接触模式运行，在高风速下以软接触模式运行。这与以前报道的具有双模式自动切换模式的 TENG 明显不同。因此，WSA-TENG 同时实现了低启动风速 （1.6m/s）、增强的耐用性和高功率密度，这使得 WSA-TENG 成为在实际环境中收集风能的理想选择。WSA-TENG 在 3.3m/s 风速下可实现 64.2mW·^m-2·^m-1s 的最大峰值功率密度。此外，它可以在连续运行 90,000 次循环后保持 99.4% 的初始电力输出。演示表明，WSA-TENG可以为温度/湿度传感器和变送器供电，实现对温度/湿度的无线实时监测，并通过电信号分析实现风速监测，在智能路灯系统中具有很大的潜在应用。这项工作提供了一种同时降低启动风速、提高耐久性和提高 TENG 功率密度的策略。