Oceanic In Situ Power via Chaotic Multi‐Energy Harvesters

ABSTRACT Wide‐area radiation and pollution affect the marine ecosystem and anthropogenic sustainability. A key implementation challenge is the lack of sustainable and on‐site power supply technology. Here, we propose a multi‐energy harvester integrated by wind‐wave dual‐driven triboelectric nanogenerators (WW ‐ TENGs) with the chaotic pendulum structure. The system was designed with multiphase flow optimization, simultaneously collecting wind and wave energy from the marine air‐sea interface. The peak power density of the device reaches 48 W/m 3 , with the energy conversion efficiency reaching 11.7%. Furthermore, we developed a marine radioactive monitoring system, which integrates in situ energy harvesting and powering and real‐time monitoring. In general, this work introduces a multiphase‐coupled energy harvesting and supply strategy, facilitating in‐depth research into the dynamic changes of marine ecosystems and advancing the early deployment of protection measures.