At 24 Wh/kg, it's going to take a lot of this to produce an amount of storage relevant to the needs of a vehicle, and that's ignoring the very high cost of the material.

For instance, the Alfa Romeo 4C had an (expensive) all-carbon tub that weighed 65kg. At this storage efficiency, that's only 1.5 kWh... about enough to drive 5 miles in a standard-size vehicle.

Interesting nevertheless, but I can't see getting excited at this density just yet, even if it is true.