It is urgently desired to develop high-performance wind energy collectors to power numerous microelectronic devices along with the Internet of Things (IoT). A roller-type triboelectric nanogenerator (R-TENG) based on rotational friction between wool and stacked interfaces is proposed and efficiently used for harvesting wind energy. Wool, an electropositive and flexible material, is utilized in the design, effectively reducing abrasion on the contact surface and adjusting the output in response to varying compression levels. The conductive layer greatly enhances the output performance, which produces more induced charge by stacking different triboelectric materials in a particular order. By adding bottom power generation units, the internal space of the unit can be fully utilized to improve its energy conversion efficiency. At 900 rpm of the motor, the instantaneous open-circuit voltage (V_OC), short-circuit current (I_SC), and transferred charge (Q_SC) of the R-TENG can reach 1504 V, 67.24 μA and 157.4 nC, respectively. After connection to a load via a rectifier bridge, the R-TENG has a maximum power output of 14.58 mW and an instantaneous power density of 11.7 W m⁻³. In laboratory wind energy harvesting experiments, the design can easily drive at least 720 LEDs and charge a 2000 μF capacitor up to about 1.5 V in 78 s. In practice, the R-TENG can collect natural wind on windy seashores and moving vehicles to charge capacitors and successfully drive small electronic devices in real time. The experimental results indicate that the stacked PTFE/FKM/Wool R-TENG exhibits considerable output performance, making it a promising solution for efficiently capturing wind energy from all directions.

中文翻译：

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一种基于羊毛之间旋转摩擦的滚轴式摩擦纳米发电机与堆叠界面的全向风能收集


迫切需要开发高性能风能收集器，为众多微电子设备和物联网 （IoT） 供电。提出了一种基于羊毛和堆叠界面之间旋转摩擦的滚轮式摩擦纳米发电机 （R-TENG），并有效地用于收集风能。羊毛是一种正电且灵活的材料，在设计中被利用，有效地减少了接触表面的磨损，并根据不同的压缩水平调整输出。导电层大大提高了输出性能，通过以特定顺序堆叠不同的摩擦电材料来产生更多的感应电荷。通过增加底部发电机组，可以充分利用机组的内部空间，提高其能量转换效率。在电机 900 rpm 时，R-TENG 的瞬时开路电压 （V_OC）、短路电流 （I_SC） 和转移电荷 （Q_SC） 分别达到 1504 V、67.24 μA 和 157.4 nC。通过整流桥连接到负载后，R-TENG 的最大功率输出为 14.58 mW，瞬时功率密度为 11.7 W m⁻³。在实验室风能收集实验中，该设计可以轻松驱动至少 720 个 LED，并在 78 秒内将 2000 μF 电容器充电至约 1.5 V。在实践中，R-TENG 可以在多风的海岸和移动的车辆上收集自然风，为电容器充电，并成功实时驱动小型电子设备。 实验结果表明，堆叠的 PTFE/FKM/Wool R-TENG 表现出相当可观的输出性能，使其成为高效捕获来自各个方向的风能的有前途的解决方案。