....storage, that costs $23 per kilowatt-hour, which they feel can be further lowered to $6 per kilowatt-hour, or 1/15th of current lithium-ion batteries.
Aluminum-nickel molten salt battery for seasonal renewables storage
https://www.pv-magazine.com/2022/04/06/aluminum-nickel-molten-salt-battery-for-seasonal-renewables-storage/
I seem to recall that $10/kwh is a sort of game changer level. $6 would be incredible.
They'll need to discover a decent substitute to Gallium Chloride first, because Gallium is likewise a rare earth with a comparable crust distribution and necessitates extensive processing. It would be fantastic if we could find a non-rare earth solution for large-scale storage.
Mechanical batteries, on the other hand, may be used for large-scale storage. The traditional method of storing water in a tiered reservoir works well, albeit that specific gravity fed battery isn't the most environmentally friendly choice and can only be created in certain places. Similar mechanical battery concepts, on the other hand, may be profitable if they can be scaled up to compensate for the energy density.