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GlockAF t1_iwn5xm1 wrote

Reply to comment by DukeLukeivi 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

You are underestimating the difficulty and especially the expense of dealing with cryogenic liquids, especially over the long term. Both the initial and ongoing maintenance costs of cryogenic pumps, seals, and pressure vessels is FAR more expensive than the very modest requirements for liquefying and storing CO2.

Just the fact that you can indefinitely store arbitrarily large quantities of liquefied CO2 in a room-temperature pressure vessel is a HUGE Advantage over dealing with cryogenic liquids. Bulk CO2 storage tanks and all the associated manifolds, valves, piping, and associated ancillary equipment don’t need to operate at high pressures or extreme temperatures, which means that they can be manufactured and maintained at far lower expense

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