this post was submitted on 22 Dec 2025
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Grid-Scale Bubble Batteries Will Soon Be Everywhere (spectrum.ieee.org)
submitted 19 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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[–] Chippys_mittens@lemmy.world 3 points 10 hours ago* (last edited 10 hours ago)

A process called DAC (Direct Air Capture) is currently used on medium scale to do this. Other instances in which they obtain CO2 is by capturing byproduct of industrial processes (the biggest and most pure being from hydrogen/ammonia production) or power plants. Again though, and I dont think this is sinking in, it is a closed loop system. So, once enough CO2 is captured, thats all that battery will ever need. Its not using new fuel to create more co2 it's taking a specific amount from currently available, filling the battery ONCE then process over.