ScholarWorks@중앙대학교

초록

Among triboelectric nanogenerators (TENGs), liquid-based TENGs (L-TENGs) have attracted attention owing to their advantage of using abundant water resources as an energy source. However, their electrical performance is lower than that of solid-solid (S-S) contact TENGs because of their relatively low charge density. In addition, the ions dissolved in water neutralize the surface charge of the polymer, reducing the long-term stability of L-TENGs. To address this problem, this study developed a new strategy that not only enhances the electrical performance but also the durability of the L-TENG. A simple charge-inducing structure (CIS) is designed to provide a strong surface charge in the reservoir via S-S contact. Hereby, the electrical output during the liquid-solid contact increased from 38.8 to 122.7 V in V-OC and from 79 to 253 mu A in I-CC. Moreover, this structure overcomes the limitation of the L-TENG, which significantly decreases output due to the influence of existing ions and enables extension of the electrical lifespan. Based on this structural design, a portable aqua ball exercise device is developed with long-term usability and presented an application for visualizing movements in real-time. Consequently, enhancing the electrical output and durability through the water inertia and CIS structure presents a new strategy for commercializing L-TENGs.

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