ScholarWorks@중앙대학교

초록

Respiration-driven airflow-type triboelectric nanogenerators (TENGs) exhibit limitations in reliable integration into masks, avoiding direct exposure to respiratory moisture and achieving high output performance. An exhalation-driven mask-valve-integrated TENG (EM-TENG) is proposed in this study. EM-TENG is entirely integrated into the interior of the mask valve and generates a high output current and power of 170 mA and 4.2 W (peak frequency: 60 Hz) with a compact size (3.87 cm3) via charge separation and a direct electron flow mechanism. An EM-TENG is unaffected by the moisture in human exhalation, ensuring that it maintains the original output for long-term breathing (1,000,000 rotations). EM-TENG features a blade rotation design that is mechanically and electrically optimized and can operate even at a human exhalation speed of 4 m s-1 and for maximized output in a small device size. Furthermore, an EM-TENG can continuously power 20 light-emitting diodes and a 5 W commercial lamp and operate a commercial thermohygrometer sensor after charging the capacitor. This device can potentially be used as a sustainable power source for commercial sensors and monitoring devices in everyday life and industrial environments in which wearing a mask is required.

키워드