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MIT scientists propose power storage using cement blocks
(www.datacenterdynamics.com)
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this post was submitted on 04 Aug 2023
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Direct link to paper: https://www.pnas.org/doi/10.1073/pnas.2304318120
Not my field but takeaways from a quick glace are that they note that the more energy dense they make it the worse it is at being concrete, and that their 10kwh number needs 45m³ of concrete. That would be 15x15x0.2m or like 55ftx55ftx8in which isn't crazy but it's a pretty decent amount.
not at all defending or praising the idea, but I'm very sure the foundation of my house is larger than that.