Amplitude‐Amplified Triboelectric Nanogenerators Enabled by Fluid‐Structure Coupling for Efficient Ocean Wave Energy Conversion

ABSTRACT Wave energy is a vital component of sustainable ocean resources, yet current energy harvesting technologies struggle with the intrinsic coupling effect of low‐frequency resonance and low‐amplitude viscosity in fluid‐solid interaction, thereby constraining the overall energy harvesting performance. Here, we present an amplitude‑amplified triboelectric nanogenerator (AA‑TENG) enabled by resonance‐enhanced fluid‐structure coupling to address these bottlenecks. AA‑TENG employs an elastic prestress modulation to deliver a transient mechanical release mechanism that increases the amplitude by up to 300%, achieving an energy conversion efficiency of 51.2%. A unit outputs a peak power of 5.2 mW at a wave frequency of 1 Hz, while scaling the volume fivefold raises the peak power to 52.48 mW, sufficient to power low‑power marine monitoring devices. This work introduces a wave resonance‐enhanced energy harvesting strategy, promising research into sustainable energy harvesting in the fluid‐structure coupling, advancing the self‐constructed marine microgrids.