Extremely high and elongated power output from a mechanical mediator-assisted triboelectric nanogenerator driven by the biomechanical energy

摘要: Abstract The triboelectric nanogenerator (TENG) is considered as a promising auxiliary source of power for portable and wearable devices. However, the output from previously suggested TENGs driven with biomechanical energy has been insufficient practical applications. This study suggests concept Mechanical Mediator-Assisted TENG (MMA-TENG). proposed MMA-TENG constructed by adding mechanical mediator (MM), which based on novel gear mechanism that transforms input motion into more favorable form generation, to an existing freestanding rotational (FR-TENG). addition MM makes capable generating extremely high elongated despite kinematic limitations movements (low velocity ~100 m/s low frequency ~ 100 Hz). Driven single hand grip motion, can generate at up 2500 Hz realize strikingly 26 mW optimal matching impedance 2 MΩ. Also, it continues duration 7 extra seconds after stopped, thereby harvesting 96 mJ 8000 cycles in total. amount over 1000 times harvested FR-TENG without same (0.084 mJ cycles). After investigation characteristics MMA-TENG, principle such striking are enabled intensively studied through detailed kinetic analysis. Finally, several proof-of-concept demonstrations including charging 100 μF capacitor charge transfer quantity ~300 μC input, real-time generation 5 V DC buck-boost circuit shown. Such outstanding expected greatly widen applicability potent harvester aid powering electronic