ScholarWorks@중앙대학교

초록

Triboelectric nanogenerators (TENGs) are promising mechanical energy harvesters. However, they suffer from intrinsically low output current (μA) and power (μW–mW), limiting their practical application. This paper presents an origami-structured ultrahigh-performance TENG (OU-TENG) with directed charge polarization and enhanced discharge, enabled by high-voltage diodes and vertical and lateral discharge channels. This structure can produce dual amplified peaks within a single folding–unfolding cycle, achieving ultrahigh outputs of 2000 V, 8 A, and 4600 W. The corresponding peak voltage, current, and power densities are 276 kV/m², 1107 A/m², and 636 kW/m², respectively. Systematic analysis revealed that the output performance was affected by the charge-inducing layer material, discharge channel geometry, diode direction, device size, and number of stacked layers. The ultrahigh output capability was demonstrated by the real-time illumination of 3000 LEDs, 50-W commercial LED bulbs, and 108-W commercial fluorescent lamps, and the continuous operation of commercial sensors. Furthermore, OU-TENG was integrated with the human body to harvest biomechanical energy from walking, jumping, and squatting motions, achieving voltages exceeding 2 kV and currents above 5 A. In summary, this study established a strategy to overcome the output limitations of conventional TENGs, highlighting the potential of OU-TENG as a practical ultrahigh-output energy harvester.

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