| Abstract [eng] |
Triboelectric nanogenerators (TENGs) are promising devices for converting low-frequency mechanical motion into electrical energy for self-powered sensors, wearable electronics, and IoT applications. PDMS is widely used in TENGs because of its flexibility, chemical stability, and ease of fabrication, but its low dielectric constant limits charge storage and output performance. This work investigated PDMS/SiC composite films to evaluate how SiC morphology and concentration affect TENG performance. Pure PDMS, PDMS/SiCp composites, and PDMS/SiCw composites were prepared on ITO-PET substrates and tested in vertical contact-separation mode using aluminum as the counter-electrode. The samples were analyzed through open circuit voltage, short circuit current, surface charge density, power density, and capacitance measurements. The results showed that SiCw improved PDMS-based TENG performance effectively than SiCp. In the morphology comparison, the 17.5 wt% SiCw sample produced the highest open-circuit voltage of about 93.42 V, while 7 wt% SiCw showed high charge density and load-matched power. In the extended whisker series, the optimum performance was obtained at 14 wt%, with a short-circuit current of about 4.58 µA, charge density of 4.64 nC/cm², and maximum power density of 13.09 µW/cm². Overall, optimized PDMS/SiCw composites are suitable for flexible TENGs in wearable and IoT self-powered sensors. |
