ScholarWorks@동국대학교

초록

Global energy demand keeps on increasing, necessitating a search for alternative options that are both sustainable and renewable. Traditional renewable methods such as hydropower, photovoltaic power, and wind power generation necessitate substantial installations and extensive space. Conversely, the harvesting of ambient, low-amplitude mechanical energy present in nature and daily activities has accelerated steeply over the past few years. Among the available technologies, triboelectric nanogenerators (TENGs) have emerged as potential candidates to harvest energy from the low-frequency biomechanical motion to power self-powered electronic devices. In this work, we reported on the fabrication of hydrogen bond mediated flexible poly(vinyl alcohol) (PVA)/graphitic carbon nitride (gCN) TENG for efficient human motion energy harvesting. PVA/gCN was used as positive triboelectric layer and PDMS was used as negative triboelectric layer. The addition of nitrogen-rich gCN into the PVA matrix produces robust interfacial hydrogen bonding interactions, resulting in improved charge trapping behaviors, and enhancing electrical properties. As a result, the optimized PVA/gCN TENG delivers a significantly improved electrical output with an ∼353.3 V of open circuit voltage, a ∼31.8 μA of short-circuit current, and a ∼80.4 nC of transferred charge, better than the pristine PVA-based TENG devices. The PVA/gCN-PDMS TENG device exhibited good durability, sustaining stable output of over 15,000 operating cycles and stability for two weeks. Moreover, TENG efficiently harvests energy from various human activities. These results demonstrate that hydrogen bond engineering is an effective strategy for improving triboelectric behaviors, highlighting the substantial potential of fabricated TENG devices for energy harvesting and the self-powered sensing applications. © 2026 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

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