Gyroscope-Structured Triboelectric Nanogenerator for Harvesting Multidirectional Ocean Wave Energy

Abstract

Wave motion in the ocean can generate plentiful energy, but it is difficult to harvest wave energy for practical use because of the low frequency and random directional characteristics of wave motion. In this paper, a gyroscope-structured triboelectric nanogenerator (GS-TENG) is proposed for harvesting multidirectional ocean wave energy. Its inner and outer generation units can operate independently in different directions, and they all adopt the friction mode of surface contact. While realizing noninterference multidirectional energy harvesting, the power generation area is increased. In the experiments, under acceleration of 6 m/s2 with variations in excitation angle, the GS-TENG can output direct currents of 0.8–3.2 μA, and the open-circuit voltages of the inner and outer generation units can reach 730 and 160 V, respectively. When the devices are networked and placed in the water, the electrical energy generated by the GS-TENGs can enable commercial thermometers to operate normally. The attenuation of direct-current output by the GS-TENG in the experiment of 30 days in water is about 8%, which verifies the good durability of the device in the water environment. Therefore, the GS-TENG has excellent application prospects in the wave energy harvesting field.

A Flexible Triboelectric Nanogenerator Based on Multilayer MXene/Cellulose Nanofibril Composite Film for Patterned Electroluminescence Display

“…The TENG possesses excellent electric performance and mechanical properties, including various working modes [ 32 , 33 , 34 , 35 ], high output voltage [ 36 , 37 ], high energy conversion efficiency [ 38 , 39 ], and flexibility and biocompatibility [ 40 , 41 ]. Moreover, many strategies including material optimization [ 42 , 43 ], structure modification [ 44 , 45 ], and charge injection [ 46 ] have been reported to greatly improve the output performance of TENG. Among them, electrode material is one of the most important factors.…”

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

“…Due to the short lifespan, high cost of regular replacement, and environmental pollution of chemical batteries, how to power sensor networks has become an urgent problem. To solve the problem, researchers have proposed some methods to scavenge ambient energy, such as wind, 1 , 2 , 3 water, 4 , 5 , 6 and mechanical vibration. 7 , 8 , 9 Now, the commonly used methods for harvesting ambient energy mainly include electromagnetic, 10 , 11 , 12 piezoelectric, 13 , 14 , 15 triboelectric nanogenerator (TENG), 16 , 17 , 18 electrostatic, 19 , 20 and magnetostrictive.…”

Asymmetric-Internal-Capacitance-Induced Charge Aggregation for the Hot-Surface Triboelectric Nanogenerator

“…However, in the first stage, the reported basic electrification property under ambient conditions is still limited to a relatively low value. For example, the σ SC of a 100 μm-thick film retains around 200 μC m –2 even with ion injection (an approach for maximum σ SC ). , Furthermore, in material optimization, common high-performance triboelectric materials, including nylon (PA), fluorinated ethylene propylene (FEP), polyvinyl chloride (PVC), and rabbit fur, have been reported for a long time. ,, In parameter optimization, an extremely thin film (<30 μm) might lower the device stability, and extreme working condition brings down the applicability. ,, Therefore, to further enhance the basic electrification property of the TENG, an alternative route is needed to break through the current level of σ SC , especially in weak-mechanical-triggering applications, such as blue energy.…”