DC Power Boosting Circuit for Freestanding-Sliding Triboelectric Nanogenerators with High Intrinsic Impedance and Multi-Harmonic Output

This study presents a freestanding sliding triboelectric nanogenerator (FS-TENG) designed for low-frequency motions (below 2 Hz). However, for practical applications, an efficient power management strategy is required to handle the harmonic outputs of the FS-TENG. The high-frequency signal is not sustainable for powering low-power electronic applications. To address the issue, a novel direct current power supply circuit (DPS) is proposed that utilizes a double charge circuit (DCC) and a comb filtering circuit (CFC) to efficiently harness harmonic sources from the FS-TENG. The direct power supply (DPS) outperforms traditional converters by reducing the impedance of the FS-TENG and collecting the target harmonic sources, which facilitates a continuous power supply to the load. The results demonstrate that the DPS is capable of providing a continuous DC voltage of 2.2 V to a 10 MΩ load with minimal ripple (0.039%) at a low operating frequency of 0.625 Hz. Additionally, the practical application of a self-powered temperature sensor is demonstrated to highlight the potential of FS-TENG and DPS for low-frequency energy harvesting solutions in real-world scenarios.