EADS is showing off an electric aircraft concept called VoltAir. Features HTS superconducting motors working two counterrotating fans in a tail shroud, and uses swappable lithium batteries in the forward ventral spaces. The idea being like the Better Place swappable battery initiative for cars, you go for swappable batteries in fully electric aircraft to allow fast turnaround, rather than dealing with charging equipment on board.
http://www.gizmag.com/eads-voltair-electric-airliner/18988/
http://www.gizmag.com/eads-voltair-electric-airliner/18988/