This could be a big deal, if it pans out:
A group of young MIT students has developed a new type of battery that runs on a rechargeable liquid fuel. The inventors call the fuel “Cambridge Crude,” and if the technology makes it to market, refueling an electric car could be as easy as pulling up to a pump. The batteries are powered by semi-solid flow cells, an innovative architecture that uses charged particles floating in a liquid electrolyte between two containers–one for storing energy and one for discharging energy. . .
The MIT News Office reports:
. . . Another potential advantage is that in vehicle applications, such a system would permit the possibility of simply “refueling” the battery by pumping out the liquid slurry and pumping in a fresh, fully charged replacement, or by swapping out the tanks like tires at a pit stop, while still preserving the option of simply recharging the existing material when time permits.
However, I would caution that this comes from the MIT press office, which has a history of over-hyping modest discoveries.