Xia Yuxuan, Zhi Jinyan, Zhang Ruichao, Zhou Feng, Liu Shuhai, Xu Qi, Qin Yong
Institute of Nanoscience and Nanotechnology, School of Materials and Energy, Lanzhou University, Lanzhou, Gansu, 730000, China.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Adv Mater. 2024 Sep;36(36):e2403361. doi: 10.1002/adma.202403361. Epub 2024 Aug 2.
Triboelectric nanogenerators (TENGs) are of great significance as sustainable power sources that harvest energy from the human body and environment. Nevertheless, due to TENG's impedance-dependent output voltage characteristics, in traditional strategy (TS), real-timely powering a sensor with TENG has a poor sensing on/off ratio (or response), and directly charging a capacitor with TENG shows a low charging efficiency. This degraded real-time powering and charging performance of TENG compared to a commercial constant voltage source is a huge challenge of the TENG field for a long time. This work proposes a synchronous switching strategy (SSS) for TENG to real-timely power sensors or charge capacitors without degrading its performance. Compared with TS, this new strategy enables sensors to have 5-7 times sensing on/off ratio enhancement when using TENG as a power source, reaching the powering ability of a commercial constant voltage source, it makes the powering performance of TENG stable under different driving frequency, improving the powering robustness of TENG. In addition, compared with TS, SSS can also enhance the charging efficiency of TENG in every charging cycle by up to 2.4 times when charging capacitors. This work contributes to real-timely powering or charging the distributed, mobile and wireless electronics using TENG.
摩擦纳米发电机（TENGs）作为从人体和环境中获取能量的可持续电源具有重要意义。然而，由于TENG的输出电压特性依赖于阻抗，在传统策略（TS）中，用TENG实时为传感器供电时传感开/关比（或响应）较差，而直接用TENG给电容器充电则显示出较低的充电效率。与商用恒压源相比，TENG这种实时供电和充电性能的下降长期以来一直是TENG领域的巨大挑战。这项工作提出了一种用于TENG的同步开关策略（SSS），以实时为传感器供电或给电容器充电而不降低其性能。与TS相比，这种新策略使传感器在使用TENG作为电源时传感开/关比提高5至7倍，达到商用恒压源的供电能力，使TENG在不同驱动频率下的供电性能稳定，提高了TENG的供电鲁棒性。此外，与TS相比，SSS在给电容器充电时还可使TENG在每个充电周期的充电效率提高2.4倍。这项工作有助于利用TENG为分布式、移动和无线电子设备实时供电或充电。
