Fur‐Brush Disk Triboelectric Nanogenerator Driven by Cantilever Oscillating Float Mechanism for Near‐Shore Marine Environment Monitoring

ABSTRACT Water wave energy is a clean, renewable energy source that, unlike fossil fuels, produces no greenhouse gases or other pollutants. This study proposes a novel cantilever oscillating float‐type triboelectric nanogenerator (COF‐TENG) for efficient blue energy harvesting. The cantilevered float structure transfers substantial wave‐induced forces to the internal power generation units, with the float's wave energy absorption efficiency being the primary factor influencing overall power generation. The vertical wave forces on floats of various shapes are analyzed using micro‐amplitude wave theory and the Froude‐Krylov hypothesis, enabling identification of the optimal float geometry under identical conditions. The float's motion under wave excitation is then simulated via computational fluid dynamics (CFD). The optimized float achieves a theoretical energy absorption efficiency of up to 37.7%. Under real wave excitation, the COF‐TENG delivers a maximum output power density of 14.9 W m −3 Hz −1 . Wave energy harvesting further enables self‐powered temperature‐humidity and water quality monitoring. This work provides theoretical guidance for float optimization and offers new insights into blue energy harvesting for self‐powered environmental monitoring.