'Dielectric Elastomer Generators' could rival traditional off-shore wave power
royalsocietypublishing.org
royalsocietypublishing.org
"The device costs less than conventional designs, has fewer moving parts, and is made of durable materials. The "design could be used in fleets of low-cost, easily maintained structures at sea within decades, to take advantage of powerful waves".
This sort of thing in homologue could also be used to harvest the energy of brownian motion, and perhaps even RMS velocity of gas phase matter:
https://www.technologyreview.com/s/427140/graphene-battery-t...
so far ive not seen anything thats will couple with quantum vacuum [zero point energy] that is purported to exist.