Is it theoretically possible and/or economically viable to construct batteries capable of supplying an entire city with electricity for a day or two?
One of the big problems with power plants of any kind is waste motion. The turbines keep churning, the head of steam continues to form, during the off-hours. If we could somehow store all that energy for later use, we would need a lot fewer power plants, and would be able to spare a lot of resources.
Is anyone working on this, or is it just not worth it? Would batteries of this kind do more harm than good?