Constructing high output performance triboelectric nanogenerator via V-shape stack and self-charge excitation. (1st June 2022) - Li, Gui
Abstract: Triboelectric nanogenerator (TENG) has proved an effective ambient mechanical energy collection and conversion technology for power supply to distributed sensors in internet of things. Rational stack of TENG units is a way to enhance its output performance in a limited space. However, the output does not linearly increase with the number of stack units due to narrow working gaps and low contact electrification ability of materials. It is still a great challenge to obtain a high output performance TENG by stacking units. Herein, a V-shape multiple stacking TENG (V-TENG) is proposed, which largely increases effective contact area and improves space utilization. A self-charge excitation circuit and a Zener diode are used to enhance its output performance and maintain output stability. The peak power of the V-TENG with self-charge excitation (VSE-TENG) reaches to 3.96 mW, which increases by more than 22 times compared with that without excitation. Furthermore, the V-TENG with power management can collect water flow energy and serve as a portable power supply for powering LEDs, a temperature and humidity sensor, and a calculator. This work provides a new strategy for boosting TENG output performance in a fixed device space. Graphical Abstract: A V-shape multiple stacking TENG combined with self-charge excitation is proposed to improve the output performance for constructing a portable power supply by harvesting mechanical energy from nature ambient and human motion. ga1 Highlights: A V-shape multiple stacking TENG (V-TENG) is proposed to increase effective working area in a fixed space. The output performance of V-TENG is largely improved by the stack with self-charge excitation technology. The V-TENG can serve as a portable power source and harvest water flow energy from nature ambient.