Hydrogen vs. Battery Electric Cars

So there is this PHEV market that is attractive to daily drivers who also want to road trip with one vehicle.  Is anyone working on a plugin/feul cell EV?  A car that will go 20 miles-ish on a battery and be able to provide Electricity from the feul cell beyond.  It seems like the mechanics would be simplified but the battery and feul cell/tank would be pricey.