Piezoelectricity

Electrical engineering

Physics

Nanogenerator

Energy (signal processing)

Energy storage

Energy harvesting

Low frequency

Engineering

Composite material

Power (physics)

Antenna (radio)

Acoustics

Materials science

Omnidirectional antenna

Computer science

Quantum mechanics

Optoelectronics

Telecommunications

Triboelectric effect

Advanced Functional Materials

Ocean wave energy is a promising green energy source, but it is difficult to exploit on a large scale due to its low frequency and the random uncertainty of its direction. In this study, a spherical eccentric structured triboelectric nanogenerator (Se‐TENG) is designed to harvest omnidirectional low‐frequency water wave energy. Power management circuits (PMM) are designed to optimize the utilization of water wave energy at low frequencies for large‐scale conversion and storage. It is found that the output performance of the Se‐TENG device is influenced by the frequency of the water waves, with the best output performance at a water wave frequency of 2.0 Hz, given that the wave amplitude is 9 cm. It is verified that within the Se‐TENG, the parallel connections of eccentric structured triboelectric nanogenerators (E‐TENGs) are more conducive to energy storage and conversion. In addition, the Se‐TENG used in conjunction with an energy storage device is able to successfully power light‐emitting diodes (LEDs) and digital thermometers, demonstrating its ability to harvest low‐frequency water wave energy in random directions. The unique structure of the Se‐TENG offers an innovative and effective way of gathering blue energy on a large scale.

Spherical Triboelectric Nanogenerator Based on Eccentric Structure for Omnidirectional Low Frequency Water Wave Energy Harvesting