Gunasekhar Ramadasu, Insun Woo, Jae Uk Yoon, Prasad Gajula, Jin Woo Bae
ABSTRACT The development of efficient and durable energy harvesting systems is essential for next‐generation smart infrastructure. Conventional polymer‐based triboelectric nanogenerators (TENGs) suffer from low dielectric constants and limited polarization, restricting output and lifespan. Here, we present a ZnSnO 3 ‐doped Ecoflex and layered double hydroxide (LDH)‐reinforced polyurethane (PU) nanofiber‐based TENG, forming a synergistic triboelectric interface. ZnSnO 3 enhances dielectric response and surface charge generation, while LDH–PU nanofibers improve charge retention and polarization stability. The optimized EZ1/PL5‐TENG delivers 186 V peak voltage, 5.6 µA peak current, and 8.84 µC/m 2 surface charge density, maintaining stable performance over 20,000 cycles. The device efficiently converts biomechanical motion into electrical energy, as demonstrated in both wearable flexion sensing and a motion‐triggered, battery‐free street lighting system that directly powers LEDs. This scalable, flexible TENG platform offers high output, long‐term durability, and practical applicability, highlighting its potential for sustainable smart city illumination, sensing networks, and self‐powered electronics.