부산대학교 도서관

Effective power management is critical in promoting the widespread utilization of triboelectric nanogenerators (TENGs), which currently suffer from low power efficiency for practical low-voltage loads and incompatibility with integrated circuits (ICs). In this study, we propose a multirelease synchronized charge extraction (MR-SCE) strategy based on the concept of “limit,” featuring unprecedented high efficiency and IC compatibility. The key to the MR-SCE strategy is to exploit the high-speed operation characteristics of electronic circuits to construct optimized discharge platforms for each small part of the TENG charge. We present a rigorous theoretical framework and simulation results, which demonstrate that nearly 100% of the TENG's maximum energy can be transferred to low-voltage energy storage units in ideal conditions, a remarkable two orders of magnitude higher than existing strategies. The verification circuit with novel structure is fully IC-compatible as it consists only of resistors, capacitors, diodes, and transistors. Despite nonideal factors, we achieve an energy efficiency of 22.3%, significantly higher than previous reports. In addition, the pathway and key technologies to achieve high-performance power management IC of the TENG are also discussed. It is believed that this work sets a new standard for the TENG power management and significantly accelerates their commercialization process.