this post was submitted on 22 Dec 2025
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Grid-Scale Bubble Batteries Will Soon Be Everywhere (spectrum.ieee.org)
submitted 2 days ago by kalkulat@lemmy.world to c/technology@lemmy.world
66 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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[–] nulluser@lemmy.world 5 points 2 days ago (1 children)

I imagine that the bubble portion is light weight enough, one could put it on the roof of a data center, apartment building, strip mall, etc. That appears to be the piece that takes up the most space.

Another thought. I wonder if the bubble portion could be oriented vertically, maybe inside a simple enclosure to protect it from wind.

[–] partial_accumen@lemmy.world 1 points 1 day ago

I was thinking about much larger scale bubbles in "unwanted" geological depressions such as old open pit mines or rock quarries. The depression in the ground might offer more protection allowing it to scale up higher in volume.