Coming under the heading 'vapourware' is this, the Nanoflowcell Quantino - a car that claims to get around the problem of recharging batteries for electric propulsion by using a charged fluid.
The car uses what are called flow batteries, which store their energy in an ionised liquid, filled with dissolved metal elements and minerals. Pass this liquid through a special membrane and you get a chemical reaction, not unlike what happens in a fuel cell - and you can draw a current from that reaction. When the power runs out, simply drain the used liquid out and put in fresh stuff. Easy.
And if Nanoflowcell's claims are to be believed, this is a potential holy grail. According to its calculations, the Quantino, using twin 175-litre flow batteries, can go for as much as 1,000km on a single fill of the special liquid (which is NOT salt water) and can reach a top speed of 200km/h.