Triboelectric nanogenerators (TENGs) could extract energy from waves large and small, even well under water, according to Chinese scientist. The seaweed-like proof-of-concept generators were ~40 x 80mm, and attached at one end to somethign solid while currents in the water wafted the free end. They were made by coated two strips of different polymers with conductive ...

This story continues at Triboelectric generator mimics seaweed to extract electricity from waves

Or just read more coverage at Electronics Weekly