Fancy charging up your electric car in 10 minutes?
This is an interesting article on supercapacitors and their place in the energy storage makeup. While they are very fast at releasing stored energy and charging back up again, they are nowhere near as energy dense as lithium ion batteries.
Still early days for the technology and they could be successfully used in combination with li-ion technology for a best of both worlds kind of thing.
Worth keeping an eye on anyway.