this post was submitted on 13 May 2025
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A German experiment proved that simple concrete spheres make fantastic batteries. Now, California plans to submerge a 9-meter diameter sphere in the ocean and is already planning versions of 30 meters (libranet.de)
submitted 1 month ago by [email protected] to c/[email protected]
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A German experiment proved that simple concrete spheres make fantastic batteries. Now, California plans to submerge a 9-meter diameter sphere in the ocean and is already planning versions of 30 meters. - farmingdale-observer.com/2025/…

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[–] [email protected] 3 points 1 month ago (1 children)

These aren't relying on gravity, theyre relying on maintaining a vacuum, and concrete is extremely porous. They're obviously sealing the inside of the chamber, but basically no coatings have a lifetime of 60 years for holding vacuum.

[–] [email protected] 2 points 1 month ago

Oh you're right. That's on me for reading while tired.

It's definitely possible to build a structure like this. Even if these prototypes might not be perfect,, I like the idea.