Long Hairong, An Jie, Xu Shuxing, Ni Xiuhui, Su Erming, Luo Yingjin, Liu Shijie, Jiang Tao
School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, P. R. China.
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, P. R. China.
Nanoscale. 2023 Feb 9;15(6):2820-2827. doi: 10.1039/d2nr06328j.
Effective power management on the outputs of triboelectric nanogenerators (TENGs) is critical for their practical applications due to the large impedance and unbalanced load matching. Recently proposed voltage multiplying circuits for external-charge excitation and self-charge excitation are usually unstable and require reversal for device restarting and common switched-capacitor-converters usually cause large switching losses. In this work, we fabricated a fractal structured charge-excitation circuit for TENGs using diodes and capacitors. The fractal switched-capacitor-converter coupled with voltage regulator diodes can greatly boost the output charge and current of the TENG without reverse starting. The managed output performance of the TENG can be controlled by the electronic component parameters and external operating frequency. Through the component and condition optimization, the fractal structured charge-excitation TENG (FSC-TENG) can achieve nearly 5.8 times charge boosting and almost 16.8 times power boosting in the pulsed mode. Furthermore, the FSC-TENG successfully drove a hygrothermograph and was integrated into a yoga mat for harvesting human-body motion energy to power an electronic watch and a pedometer. The FSC-TENG with good charge accumulation properties and stability is a promising candidate for practical self-powered applications.
由于摩擦纳米发电机（TENG）输出端存在大阻抗和负载匹配不平衡问题，其有效功率管理对实际应用至关重要。最近提出的用于外部电荷激励和自电荷激励的倍压电路通常不稳定，且设备重启需要反向操作，而普通开关电容转换器通常会导致较大的开关损耗。在这项工作中，我们使用二极管和电容器为TENG制作了一种分形结构的电荷激励电路。与稳压二极管耦合的分形开关电容转换器可以在无需反向启动的情况下极大地提高TENG的输出电荷和电流。TENG的管理输出性能可以通过电子元件参数和外部工作频率来控制。通过元件和条件优化，分形结构电荷激励TENG（FSC-TENG）在脉冲模式下可实现近5.8倍的电荷提升和近16.8倍的功率提升。此外，FSC-TENG成功驱动了一台湿度温度记录仪，并被集成到瑜伽垫中，用于收集人体运动能量为电子手表和计步器供电。具有良好电荷积累特性和稳定性的FSC-TENG是实际自供电应用的一个有前途的候选者。
