And how do you cool the battery during such a fast charge? what % of the energy is lost in heat from the chemical reaction - even Tesla has to obey the laws of thermo dynamics.
Thinking about it from a thermofluids angle You could I suppose have a complex system of heat exchangers built in to the the battery pack and hook the car up to a water connection and flush chilled water (or better some non conductive fluid) through whilst charging but water and high voltage and amps are not the best of friends.
Now where did i put my steam tables :-)
This is largely a solved problem, both from the sides of technology and deployment. It's just that public perception hasn't caught up yet. Give it 5 years and just about everyone will want one of these cars. For everyday use you won't even need the quick-charge capability.
They sold a batch of MiEV / IOn for $15.000 here and so far everybody is very enthusiastic about them. I think 5 years is a tad optimistic but I give it less then 10 years.
DOE targets 5k hrs of operation for fuel cells used in transportation. I haven't been able to find an hours of operation for batteries. Wikipedia gins up some numbers to claim 10 to 20 years life expectancy. On the whole it seems batteries are in the lead at this point, but both are near the expected baseline for automobiles.
You're not going to be refueling a hydrogen fueled car that quick - it's a volatile, extremely high pressure, extremely cold gas. The safety considerations are substantial.