Trapezoidal Cantilever-Structure Triboelectric Nanogenerator Integrated with a Power Management Module for Low-Frequency Vibration Energy Harvesting

Abstract

Wide-band vibration is abundant in various industrial equipment, but extracting low frequency energy is challenging. Here, we demonstrated a trapezoidal cantilever-structure triboelectric nanogenerator (C-TENG) that can efficiently harvest energy from vibration in the range of 1−22 Hz. The C-TENG is fabricated with a flexible film electrode, and its mechanical model is analyzed with structural mechanics for the optimal performance of the device. The C-TENG can harvest the vibration source with a frequency as low as 1 Hz, and its output power density reaches 62.2 W/m 3 at a vibration frequency of 5 Hz. Furthermore, a power management module is developed, and its integration with TENG arrays enables the selfpowered timing and wireless transmitting systems. This work proposes an effective strategy to harvest ubiquitously distributed but usually neglected vibration sources, which would contribute to the development of self-powered electronic systems and Internet of Things.

Recent Advances in Mechanical Vibration Energy Harvesters Based on Triboelectric Nanogenerators

“…The theoretical lumped-mass model of this TENG is established. The main and secondary TENGs have different peak power densities of 10.77 and 12.5 µW cm −2 , respectively, according to the test result, both of which are higher than many reported cantilever-based TENGs, [96,97,98b] Then, as exhibited in Figure 6e, this TENG was successfully applied on a vacuum compression pump for 5 h, showing its feasibility of powering in daily life, [44] Copyright 2022, American Chemical Society. g) Structure and working principle of the double layered cantilever beam TENG.…”

“…As shown in Figure 5c, Ren et al proposed a trapezoidal cantilever-structure TENG (C-TENG) for wideband vibration energy extracting. [44] In this design, the aluminum coating is developed on two surfaces of FEP film as the positive triboelectric layer and the flexible vibration electrode, which is demonstrated in Figure 5d. With the flexible electrode sandwiched in two negative FEP layers, which forms a trapezoid, two TENG units are integrated in one device.…”

“…To further enhance the electrical output, an array-type vibration energy harvester integrated with eight cantilever-beambased TENGs (CB-TENG) is designed by Lian et al for transverse VEH of drill pipes, [45] which is illustrated in Figure 6f. In each unit, two vibrators structure like C-TENG [44] are set in CB-TENG, whose output voltage is 2.9 times than the one vibrator structure. To further utilize the internal space of the drill pipe and improve the electrical output, eight CB-TENGs are integrated along the circumference to form the array.…”

Self‐Powered Multifunctional Human–Machine Interfaces for Respiratory Monitoring and Smart System Control

“…Triboelectric nanogenerator (TENG), based on the coupling effect of triboelectrification and electrostatic induction, has been demonstrated as a powerful technology for converting pervasive mechanical energy into electrical energy. [19][20][21][22][23][24] It has been widely used for energy harvesting and self-powered sensors to detect mechanical motions and deformations due to its simple mechanism, low cost, high sensitivity, and remarkable adaptability. [25][26][27][28] Mao et al proposed air-flow-driven TENGs for developing breathing sensors integrated with a mask.…”

A cantilever-structure triboelectric nanogenerator for energy harvesting and defect detection via long short-term memory network

“…Because of the advantages of easy fabrication and installation, effective scavenging low-frequency vibration energy, and so on, the devices based on cantilever structure are commonly used to harvest ambient energy. 44 , 45 , 46 However, during the operation of cantilever-structure energy harvesting devices, cracks are usually inevitable in the overstress area of cantilevers. Aiming at defect detection of cantilevers, Zhao et al.…”