this post was submitted on 22 Dec 2025
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228
Grid-Scale Bubble Batteries Will Soon Be Everywhere (spectrum.ieee.org)
submitted 15 hours ago by kalkulat@lemmy.world to c/technology@lemmy.world
52 comments fedilink hide all child comments
 

"This giant bubble on the island of Sardinia holds 2,000 tonnes of carbon dioxide. But the gas wasn’t captured from factory emissions, nor was it pulled from the air. It came from a gas supplier.... "The facility compresses and expands CO2 daily in its closed system, turning a turbine that generates 200 megawatt-hours of electricity, or 20 MW over 10 hours."

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[–] sunbeam60@feddit.uk 20 points 12 hours ago (1 children)

That’s a hell of a lot better than most other systems. If true, and if scalable, this is a huge innovation.

[–] fullsquare@awful.systems 11 points 11 hours ago* (last edited 11 hours ago)

compressors, turbines (like steam turbines), piping, some of which heat-resistant (500C), container for liquid carbon dioxide, lots of plastic for the bubble, something for thermal storage, dry and clean carbon dioxide, these aren't unusual or restricted resources, don't depend on critical raw materials or anything like that