I found this interesting, a UK company, Augmented Optics, has filed for patents of a new supercapacitor breakthrough that may allow batteries to charge in minutes. They are hoping to build a prototype car next year that will be able to travel 150 miles and charge in seconds. Apparently there capacitors are using soft contract lens technology to create a polymer that can hold a large amount of electricity and recharge quickly. They also believe it will cost less to produce than lithium ion batteries.
It will be interesting to see if this pans out, or at least leads to a further breakthrough. It will be interesting to hear more once this technology is tested in a prototype car.