Energy Storage Triboelectric Nanogenerator Based on Ratchet Mechanism for Random Ocean Energy Harvesting

Abstract

The instability of the ocean waves, such as intermittence, randomness, and irregularity, greatly affects the application of a triboelectric nanogenerator (TENG) in its aspects and leads to the irregularity and uncontrollability of its output performance. Hence, the energy storage TENG (ES-TENG) based on the ratchet mechanism is proposed in this work. The ES-TENG uses the ratchet mechanism to store the wave energy in the clockwork spring and then releases it in a centralized way to convert the wave energy into electric energy. When the ES-TENG adopts this method, the change of external excitation does not affect its output performance. Simultaneously, the shell of the ES-TENG is duck-shaped, which can better adapt to the wave environment. The peak power, open-circuit voltage, and short-circuit current of the ES-TENG are 6.2 mW, 495 V, and 19 μA, respectively. In the simulated wave experiment, the ES-TENG can successfully drive a temperature sensor. In summary, this work shows an economic, environmental friendly TENG that can adapt to the wave motion, and its output performance is not affected by wave instability, which has an important guiding significance for the further development and utilization of TENG in ocean energy.

Energy extraction from high-voltage line based on AC field coupling

“…In addition, friction nanogenerators can be used to power grid monitoring devices [19,20,21] . However, the stability of their power supply is affected by the frequency and amplitude of the mechanical motion [22,23,24] . Therefore, it is important to develop novel self-powered devices for power line monitoring applications.…”

Advances of Strategies to Increase the Surface Charge Density of Triboelectric Nanogenerators: A Review

“…However, these essential modes are still utilized in the current architecture. Over the years, researchers have explored diverse applications of TENG, including micro/nano energy, [11][12][13][14][15][16] blue energy, [17,18] self-actuated sensing system, [19][20][21] and highvoltage power supply, which has furnished a sound basis foundation for the popularization and application of the TENG. However, several challenges impede their journey towards maturity, which we will comprehensively discuss in this review.…”

Core–Sheath Fiber-Based Triboelectric Nanogenerators for Energy Harvesting and Self-Powered Straight-Arm Sit-Up Sensing

“…Wearable electronics and wireless communication network gain the rapid development, which is making a difference in the lifestyle of people. − The stretchable and flexible energy devices that provide energy for the mobile wearable devices and wireless communication network are more significative, gaining widespread attention. − The traditional batteries with disadvantages of large size, inadequate safety, unsatisfactory flexibility, and frequent recharging have not met the requirements of wearable electronics. , Thus, it is highly necessary to develop a smart, integrated, and flexible power supply. Triboelectric nanogenerators (TENGs), based on the coupling of triboelectrification and electrostatic induction, can effectively scavenge the manifold high-entropy mechanical energy and generate electrical energy. − Furthermore, the one-dimensional fiber-based TENGs (F-TENGs) arise rapidly to break through the limitations of the traditional airtight film-based TENGs for the wearable applications. ,− The F-TENG possesses the characteristics of good breathability, comfort, and flexibility, which make it more suitable to wear. , Accompanied by human body motion, F-TENGs can successfully harvest biomechanical energy. These advantages make them an extremely attractive energy system in smart wearable electronics. , …”