Following a link by ECW often commenter Peter Lang to his YouTube channel, I came across this interesting way to capture ambient energy through natural water molecules movement (Brownian motion) using one electrode of graphene and the other of hematene (which is often called the “iron graphene”).
Peter has build some very simple looking prototypes doing the graphene and hematene materials himself, and that can put out some decent voltage by being submerged in a very shallow amount of water in a tray.
One of his videos shows it turning on LEDs with an array of a few wires in a dish of water.
He claims the battery will keep generating voltage as long as the water is in liquid state.
He also has a series of videos of a preparation of these wires that spontaneously electrolyze water and begins bubbling the gas.
I think these devices, regardless of the efficiency, have a good chance of becoming sort of “light independent” competitors to solar panels, if we take in account the Apparent good performance of these basic Prototypes, this is a very interesting way to capture ambient heat for practical purposes.