Carbon has been used in batteries for many years. The difference with this one is that both the anode and cathode are made of carbon and it charges 20 times faster than Lithium Ion batteries.
For example, with this technology, you can charge a Nissan Leaf electric car in 12 minutes instead of 4 hours!
http://www.gizmag.com/dual-carbon-fast-charging-battery/32121/
