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GlockAF t1_iwn3wpf wrote

Reply to comment by MLS_Analyst in Italian startup Energy Dome claims its CO2 grid storage batteries are cheaper than lithium-ion, and need no rare minerals, being made from just off-the-shelf steel components, water & CO2. It's opening its first 200 MWh facility in Sardinia in 2023 by lughnasadh

The most critical part of this design is that utilizing the CO2 phase change from liquid to gaseous form and back limits overall pressure on system components to about 1200 psi, probably averaging closer to 850-900.

This means that the tanks, piping, manifolds, etc. do not have to handle high pressure like they would with a compressed air system, and can be built much more cheaply while still maintaining good safety margins.

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