There are a few promising battery designs that are too heavy for vehicles, but would be ideal for a fixed application. That would free up lots of trace metals for mobile application. There are flow battery designs that do not degrade with charging cycles for example.
However, as we all know, flying takes a lot of energy and minimum mass. Flying fast even more so. The real physical limitations of batteries are at odds with payload, speed and range to be practical. I am reminded of the nuclear powered B-36 idea that thankfully was rewarded with a head slap.