[al2o3cr]

I suspect large-scale fixed installations are more likely to end up using some kind of flow battery:

https://spectrum.ieee.org/green-tech/fuel-cells/its-big-and-...

The big advantage there is independent scaling: peak discharge is tied to the total membrane area / pumping capability while capacity is tied to the amount of reactants that can be stored.

[russdill]

I'm pretty excited about the potential benefits of flow batteries. Hopefully they can get the tech to work economically for grid storage.