Could you electrically charge a liquid or granules to refuel EVs with it? Is there a physical law that would make an electrically charged liquid or granules impossible to produce? Theoretically it should be possible to refuel an EV by adding two different liquids to it in two enclosed storage tanks, one positively charged and one negatively. Once the energy is used you just empty the tanks and add new charged fluids. Please help me to grasp why that would be infeasible.
 A: It would be pretty tough to manage a liquid with a large net charge: its self repulsion would tend to make it fly apart explosively. Basically you are describing a large capacitor. Capacitors are usually energized by pushing electric current through wires, not charged liquid through pipes.
What you CAN do is store a bunch of positive and negative electric charge all mixed together in a liquid in a configuration such that you can extract energy. That is what liquid hydrogen is: a bunch of positive charges hanging out in pairs surrounded by an equal number of negative charges. The pairs of positive charges would much rather position themselves around oxygen atoms, and if you let them, energy is released.
A: Yes, granules can carry battery-like charge; this is the principle of
the 'flow battery', and is a battery chemistry with two 'electrodes' which
are fluid enough to charge/pump into storage on energy intake, and
pump from storage/discharge to cover an energy need.
It is possible to do this with large-scale safe storage (it's not flammable)
and combine (which creates  reaction) only under complete control.
It isn't compact, however, since the usual application is the size
of a few big swimming pools for storage.   I'm told, in case of a spill,
the materials can be designed to be safe, even edible.
