Imagine a device that turns chaotic ocean waves into electricity while simultaneously acting as a high-precision sensor. This paper reveals how triboelectric nanogenerators are solving two major marine challenges at once. With global resource consumption and pollution rising, finding pollution-free renewable energy sources has become imperative to achieve carbon neutrality.

While solar and wind are explored, the wide distribution of oceans makes developing ocean energy a vital approach to solving serious energy problems. This figure illustrates the working mechanism of a triboelectric nanogenerator, or TENG, and compares its performance against solar cells and electromagnetic generators.

The table highlights that TENGs offer a power density ranging from one hundred to five hundred watts per square meter, which is significantly higher than the other methods shown. Additionally, the flowchart demonstrates how this technology processes wave fluctuations to extract precise data on ocean parameters like wave height and velocity.

Finally, the schematic depicts a self-powered navigation system using these sensors to help ships avoid reef areas by modifying their routes in real time. Invented in 2012, the triboelectric nanogenerator couples contact electrification and electrostatic induction to generate power from motion.

When materials separate after contact, electrons flow back through an external circuit to balance the potential difference created by their different electron attractions. Compared to solar energy, this technology offers continuous operation, low cost, and strong adaptability to various environments.

It adapts better to low-frequency wave energy than electromagnetic generators, which are more suitable for high-entropy energy sources. Due to high efficiency and low price, TENG is considered a new idea for ocean energy harvesting despite complex access situations. One design uses a pendulum and tumbler to create resonance, improving energy harvesting efficiency in low-frequency water waves.

To harvest current energy, a flexible flag-like system uses vortex streets induced by cylinders to enhance vibration and improve electrical output at lower flow velocities. Another rolling structure using nylon balls achieves high charge transfer efficiency even under low-amplitude random wave motions from all directions.

Although peak power densities are often limited, a droplet harvester transfers interface effects to bulk effects, heightening instantaneous power density by several orders of magnitude. Experimental results show open-circuit voltage reaching ten kilovolts and short-circuit current reaching one point five milliamperes.

Beyond energy, TENG acts as a sensor for vital parameters like water wave spectrum and sea-level air pressure with low power consumption. These sensors boast a high sensitivity of three hundred forty-six point five pico-Coulombs per Newton and accuracy up to ninety-seven point eight percent.

A tubular sensor with ultrahigh sensitivity can recognize six basic ocean wave parameters and mechanical energy spectra from electrical signals alone. Hybrid generators have established long-distance communication nodes spanning one point five kilometers to realize real-time forewarning for ship navigation.

Underwater electric fields generated by these devices allow text and image signals to be transmitted at sixteen bits per second without waveform distortion over one hundred meters. To manage irregular pulsed output, power converters achieve impedance matching with sixty percent energy storage efficiency.

Despite improvements, forming a unified standard for structures remains difficult due to the complexity of ocean conditions. Optimizing designs through modular classification could reduce research periods and lessen development costs for specific applications.

Blue energy harvesting is entering an intelligent internet of things era requiring sustainable energy for large-scale sensors in disaster prevention and resource detection. By combining big data analysis and cloud computing, this digital revolution integrates energy harvesting and sensing to improve our understanding of the ocean.

Triboelectric nanogenerators offer a unique dual solution for the ocean by harvesting low-frequency wave energy and enabling self-powered, high-sensitivity sensing networks without external batteries.