Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
Biosensors (Basel). 2023 May 15;13(5):548. doi: 10.3390/bios13050548.
Harvesting biomechanical energy for electricity as well as physiological monitoring is a major development trend for wearable devices. In this article, we report a wearable triboelectric nanogenerator (TENG) with a ground-coupled electrode. It has a considerable output performance for harvesting human biomechanical energy and can also be used as a human motion sensor. The reference electrode of this device achieves a lower potential by coupling with the ground to form a coupling capacitor. Such a design can significantly improve the TENG's outputs. A maximum output voltage up to 946 V and a short-circuit current of 36.3 μA are achieved. The quantity of the charge that transfers during one step of an adult walking reaches 419.6 nC, while it is only 100.8 nC for the separate single-electrode-structured device. In addition, using the human body as a natural conductor to connect the reference electrode allows the device to drive the shoelaces with integrated LEDs. Finally, the wearable TENG is able to perform motion monitoring and sensing, such as human gait recognition, step count and movement speed calculation. These show great application prospects of the presented TENG device in wearable electronics.
采集生物力学能量并进行生理监测是可穿戴设备的主要发展趋势。本文报道了一种具有接地电极的可穿戴摩擦纳米发电机（TENG）。它具有相当可观的人体生物力学能量采集性能，也可用作人体运动传感器。该设备的参考电极通过与地面耦合形成耦合电容器，实现更低的电势。这种设计可以显著提高 TENG 的输出性能。实现了高达 946 V 的最大输出电压和 36.3 μA 的短路电流。成年人行走一步所转移的电荷量达到 419.6 nC，而单独的单电极结构设备只有 100.8 nC。此外，利用人体作为天然导体将参考电极连接起来，可以使设备驱动集成 LED 的鞋带。最后，可穿戴 TENG 能够进行运动监测和传感，如人体步态识别、步数计算和运动速度计算。这些都展示了所提出的 TENG 设备在可穿戴电子领域的巨大应用前景。
