With the rise of portable and wearable electronics, a fast‐charging, long‐lasting power solution is needed; thus, there are attempts to harvest energy from the ambient environment. Mechanical energy harvesting through piezoelectric and triboelectric nanogenerators (PENG and TENG) is a promising approach due to their light weight, low cost, and high‐power density in comparison to other technologies. Both types of generators are capable of charging portable and smart devices on their own by converting mechanical energy into electricity. However, most previous methods have excessive input conditions, such as high rpm and input frequency, that can be only applied with other actuators. Here, a hand‐held gyroscopic generator is presented that uses the gyroscopic principle to reach a rotation rate above 8000 rpm with only hand input. The generator comprises a rotating flywheel inside a casing. Both the flywheel and casing have a TENG, and with a hybrid generator, electrical power is produced from rotation, vibration, and centrifugal force during operation. The device shows a consistent open‐circuit voltage (V_OC) of 90 V and a closed‐circuit current (I_CC) of 11 µA with a frequency of 200 Hz. As a stand‐alone device, this generator can power portable sensors and smartphones through hand rotation.

中文翻译：

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用于为便携式设备充电的手动陀螺仪混合纳米发电机

随着便携式和可穿戴电子产品的兴起，需要快速充电、持久的电源解决方案；因此，人们尝试从周围环境中获取能量。与其他技术相比，通过压电和摩擦电纳米发电机（PENG 和 TENG）收集机械能是一种很有前途的方法，因为它们重量轻、成本低且功率密度高。这两种类型的发电机都能够通过将机械能转化为电能来为便携式和智能设备自行充电。然而，大多数以前的方法都有过多的输入条件，例如高转速和输入频率，只能应用于其他执行器。这里提出了一种手持式陀螺仪发生器，它利用陀螺仪原理，只需手动输入即可达到 8000 rpm 以上的旋转速率。该发电机包括位于壳体内的旋转飞轮。飞轮和壳体均具有 TENG，并配有混合发电机，在运行过程中通过旋转、振动和离心力产生电力。该器件在频率为 200 Hz 时显示出一致的 90 V 开路电压 (VOC) 和 11 µA_闭路电流( ICC ) 。作为独立设备，该发电机可以通过手动旋转为便携式传感器和智能手机供电。