Saltwater Over Graphene Generates Electricity
 

It slices, it dices, it's an amazing thermal conductor, it is bendable and now it generates electricity using saltwater. Is there anything graphene can't do? Here, we show that a voltage of a few millivolts can be produced by moving a droplet of sea water or ionic solution over a strip of monolayer graphene under ambient conditions. Through experiments and density functional theory calculations, we find that a pseudocapacitor is formed at the droplet/graphene interface, which is driven forward by the moving droplet, charging and discharging at the front and rear of the droplet. Here's a neat video of graphene slicing and dicing ice.

http://www.hardocp.com/news/2014/04/...s_electricity/