Engineers just demonstrated a triboelectric wave energy harvester that generates useful electrical power from ocean swells as small as 10 centimeters — capturing wave energy across calm conditions that defeat all existing wave power technologies requiring minimum wave heights of 1 to 2 meters.
A team from the Chinese Academy of Sciences deployed a network of soft silicone triboelectric units linked in a flexible mesh array on the ocean surface near Qingdao. Each unit harvests energy from the relative motion between silicone layers as small waves deform the mesh — generating 1.4 watts per square meter of array surface from 10-centimeter waves and 8.7 watts per square meter from 50-centimeter waves. The array operated continuously for 60 days including typhoon conditions where wave heights exceeded 4 meters without structural failure or performance degradation.
Over 70% of Earth's ocean surface experiences predominantly small wave conditions below 1 meter throughout the year — a resource entirely inaccessible to conventional wave energy converters. The flexible mesh deploys from a standard shipping container and self-orients to wave direction without any mechanical steering system.
Source: Chinese Academy of Sciences Institute of Oceanology, Nature Energy, 2024
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